1399572881 has 4 divisors (see below), whose sum is σ = 1599511872. Its totient is φ = 1199633892.

The previous prime is 1399572871. The next prime is 1399572883. The reversal of 1399572881 is 1882759931.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1882759931 = 13 ⋅144827687.

It is a cyclic number.

It is not a de Polignac number, because 1399572881 - 2⁶ = 1399572817 is a prime.

It is a super-2 number, since 2×1399572881² = 3917608498461280322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1399572883) 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, 99969485 + ... + 99969498.

It is an arithmetic number, because the mean of its divisors is an integer number (399877968).

Almost surely, 2^1399572881 is an apocalyptic number.

It is an amenable number.

1399572881 is a deficient number, since it is larger than the sum of its proper divisors (199938991).

1399572881 is an equidigital number, since it uses as much as digits as its factorization.

1399572881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199938990.

The product of its digits is 1088640, while the sum is 53.

The square root of 1399572881 is about 37410.8658146266. The cubic root of 1399572881 is about 1118.5751654381.

The spelling of 1399572881 in words is "one billion, three hundred ninety-nine million, five hundred seventy-two thousand, eight hundred eighty-one".