899635081 has 2 divisors, whose sum is σ = 899635082. Its totient is φ = 899635080.

The previous prime is 899635073. The next prime is 899635141. The reversal of 899635081 is 180536998.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 833765625 + 65869456 = 28875^2 + 8116^2 .

It is a cyclic number.

It is not a de Polignac number, because 899635081 - 2³ = 899635073 is a prime.

It is a super-2 number, since 2×899635081² = 1618686557931753122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (899645081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449817540 + 449817541.

It is an arithmetic number, because the mean of its divisors is an integer number (449817541).

Almost surely, 2^899635081 is an apocalyptic number.

It is an amenable number.

899635081 is a deficient number, since it is larger than the sum of its proper divisors (1).

899635081 is an equidigital number, since it uses as much as digits as its factorization.

899635081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 466560, while the sum is 49.

The square root of 899635081 is about 29993.9174000330. The cubic root of 899635081 is about 965.3588760686.

The spelling of 899635081 in words is "eight hundred ninety-nine million, six hundred thirty-five thousand, eighty-one".