899997012 has 36 divisors (see below), whose sum is σ = 2281542900. Its totient is φ = 299135232.

The previous prime is 899997011. The next prime is 899997019. The reversal of 899997012 is 210799998.

It can be written as a sum of positive squares in 2 ways, for example, as 385886736 + 514110276 = 19644^2 + 22674^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 899997012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (899997011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23253 + ... + 48380.

Almost surely, 2^899997012 is an apocalyptic number.

It is an amenable number.

899997012 is an abundant number, since it is smaller than the sum of its proper divisors (1381545888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

899997012 is a wasteful number, since it uses less digits than its factorization.

899997012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71992 (or 71987 counting only the distinct ones).

The product of its (nonzero) digits is 734832, while the sum is 54.

The square root of 899997012 is about 29999.9501999587. The cubic root of 899997012 is about 965.4883161295.

The spelling of 899997012 in words is "eight hundred ninety-nine million, nine hundred ninety-seven thousand, twelve".