899657387 has 2 divisors, whose sum is σ = 899657388. Its totient is φ = 899657386.

The previous prime is 899657377. The next prime is 899657389. The reversal of 899657387 is 783756998.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 899657387 - 2⁴ = 899657371 is a prime.

Together with 899657389, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (899657389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449828693 + 449828694.

It is an arithmetic number, because the mean of its divisors is an integer number (449828694).

Almost surely, 2^899657387 is an apocalyptic number.

899657387 is a deficient number, since it is larger than the sum of its proper divisors (1).

899657387 is an equidigital number, since it uses as much as digits as its factorization.

899657387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22861440, while the sum is 62.

The square root of 899657387 is about 29994.2892397870. The cubic root of 899657387 is about 965.3668545321.

The spelling of 899657387 in words is "eight hundred ninety-nine million, six hundred fifty-seven thousand, three hundred eighty-seven".