838897957 has 4 divisors (see below), whose sum is σ = 839550060. Its totient is φ = 838245856.

The previous prime is 838897949. The next prime is 838897967. The reversal of 838897957 is 759798838.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 605602881 + 233295076 = 24609^2 + 15274^2 .

It is a cyclic number.

It is not a de Polignac number, because 838897957 - 2³ = 838897949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (838897907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 324118 + ... + 326695.

It is an arithmetic number, because the mean of its divisors is an integer number (209887515).

Almost surely, 2^838897957 is an apocalyptic number.

It is an amenable number.

838897957 is a deficient number, since it is larger than the sum of its proper divisors (652103).

838897957 is a wasteful number, since it uses less digits than its factorization.

838897957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652102.

The product of its digits is 30481920, while the sum is 64.

The square root of 838897957 is about 28963.7352045623. The cubic root of 838897957 is about 943.1259883689.

The spelling of 838897957 in words is "eight hundred thirty-eight million, eight hundred ninety-seven thousand, nine hundred fifty-seven".