899981057 has 8 divisors (see below), whose sum is σ = 929359872. Its totient is φ = 870624000.

The previous prime is 899981023. The next prime is 899981059. The reversal of 899981057 is 750189998.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 899981057 - 2⁶ = 899980993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 899980993 and 899981011.

It is not an unprimeable number, because it can be changed into a prime (899981059) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145808 + ... + 151854.

It is an arithmetic number, because the mean of its divisors is an integer number (116169984).

Almost surely, 2^899981057 is an apocalyptic number.

It is an amenable number.

899981057 is a deficient number, since it is larger than the sum of its proper divisors (29378815).

899981057 is a wasteful number, since it uses less digits than its factorization.

899981057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10879.

The product of its (nonzero) digits is 1632960, while the sum is 56.

The square root of 899981057 is about 29999.6842816720. The cubic root of 899981057 is about 965.4826107561.

The spelling of 899981057 in words is "eight hundred ninety-nine million, nine hundred eighty-one thousand, fifty-seven".