1300881649 has 4 divisors (see below), whose sum is σ = 1301634036. Its totient is φ = 1300129264.

The previous prime is 1300881643. The next prime is 1300881677. The reversal of 1300881649 is 9461880031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 546390625 + 754491024 = 23375^2 + 27468^2 .

It is a cyclic number.

It is not a de Polignac number, because 1300881649 - 2⁷ = 1300881521 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1300881643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 373594 + ... + 377059.

It is an arithmetic number, because the mean of its divisors is an integer number (325408509).

Almost surely, 2^1300881649 is an apocalyptic number.

It is an amenable number.

1300881649 is a deficient number, since it is larger than the sum of its proper divisors (752387).

1300881649 is an equidigital number, since it uses as much as digits as its factorization.

1300881649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 752386.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 1300881649 is about 36067.7369542365. The cubic root of 1300881649 is about 1091.6395517794.

The spelling of 1300881649 in words is "one billion, three hundred million, eight hundred eighty-one thousand, six hundred forty-nine".