801899831 has 2 divisors, whose sum is σ = 801899832. Its totient is φ = 801899830.

The previous prime is 801899827. The next prime is 801899893. The reversal of 801899831 is 138998108.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 801899831 - 2² = 801899827 is a prime.

It is a super-2 number, since 2×801899831² = 1286086677915657122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (801898831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400949915 + 400949916.

It is an arithmetic number, because the mean of its divisors is an integer number (400949916).

Almost surely, 2^801899831 is an apocalyptic number.

801899831 is a deficient number, since it is larger than the sum of its proper divisors (1).

801899831 is an equidigital number, since it uses as much as digits as its factorization.

801899831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 47.

The square root of 801899831 is about 28317.8359166092. The cubic root of 801899831 is about 929.0520386450.

The spelling of 801899831 in words is "eight hundred one million, eight hundred ninety-nine thousand, eight hundred thirty-one".