1426636749 has 4 divisors (see below), whose sum is σ = 1902182336. Its totient is φ = 951091164.

The previous prime is 1426636733. The next prime is 1426636763. The reversal of 1426636749 is 9476366241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1426636749 - 2⁴ = 1426636733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1426636698 and 1426636707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1426636049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 237772789 + ... + 237772794.

It is an arithmetic number, because the mean of its divisors is an integer number (475545584).

Almost surely, 2^1426636749 is an apocalyptic number.

It is an amenable number.

1426636749 is a deficient number, since it is larger than the sum of its proper divisors (475545587).

1426636749 is an equidigital number, since it uses as much as digits as its factorization.

1426636749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475545586.

The product of its digits is 1306368, while the sum is 48.

The square root of 1426636749 is about 37770.8452248556. The cubic root of 1426636749 is about 1125.7392340464.

It can be divided in two parts, 14266 and 36749, that added together give a palindrome (51015).

The spelling of 1426636749 in words is "one billion, four hundred twenty-six million, six hundred thirty-six thousand, seven hundred forty-nine".