899361917 has 2 divisors, whose sum is σ = 899361918. Its totient is φ = 899361916.

The previous prime is 899361913. The next prime is 899361919. The reversal of 899361917 is 719163998.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 894548281 + 4813636 = 29909^2 + 2194^2 .

It is a cyclic number.

It is not a de Polignac number, because 899361917 - 2² = 899361913 is a prime.

Together with 899361919, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (899361913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449680958 + 449680959.

It is an arithmetic number, because the mean of its divisors is an integer number (449680959).

Almost surely, 2^899361917 is an apocalyptic number.

It is an amenable number.

899361917 is a deficient number, since it is larger than the sum of its proper divisors (1).

899361917 is an equidigital number, since it uses as much as digits as its factorization.

899361917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 734832, while the sum is 53.

The square root of 899361917 is about 29989.3633977115. The cubic root of 899361917 is about 965.2611594158.

The spelling of 899361917 in words is "eight hundred ninety-nine million, three hundred sixty-one thousand, nine hundred seventeen".