64244137 has 4 divisors (see below), whose sum is σ = 65149056. Its totient is φ = 63339220.

The previous prime is 64244101. The next prime is 64244197. The reversal of 64244137 is 73144246.

64244137 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64244137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64244099 and 64244108.

It is not an unprimeable number, because it can be changed into a prime (64244197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 452353 + ... + 452494.

It is an arithmetic number, because the mean of its divisors is an integer number (16287264).

Almost surely, 2^64244137 is an apocalyptic number.

It is an amenable number.

64244137 is a deficient number, since it is larger than the sum of its proper divisors (904919).

64244137 is an equidigital number, since it uses as much as digits as its factorization.

64244137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 904918.

The product of its digits is 16128, while the sum is 31.

The square root of 64244137 is about 8015.2440387052. The cubic root of 64244137 is about 400.5079733845.

The spelling of 64244137 in words is "sixty-four million, two hundred forty-four thousand, one hundred thirty-seven".