938889257 has 4 divisors (see below), whose sum is σ = 940229316. Its totient is φ = 937549200.

The previous prime is 938889251. The next prime is 938889271. The reversal of 938889257 is 752988839.

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 503374096 + 435515161 = 22436^2 + 20869^2 .

It is a cyclic number.

It is not a de Polignac number, because 938889257 - 2⁸ = 938889001 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 938889196 and 938889205.

It is not an unprimeable number, because it can be changed into a prime (938889251) 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, 668978 + ... + 670379.

It is an arithmetic number, because the mean of its divisors is an integer number (235057329).

Almost surely, 2^938889257 is an apocalyptic number.

It is an amenable number.

938889257 is a deficient number, since it is larger than the sum of its proper divisors (1340059).

938889257 is a wasteful number, since it uses less digits than its factorization.

938889257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340058.

The product of its digits is 8709120, while the sum is 59.

The square root of 938889257 is about 30641.2998581979. The cubic root of 938889257 is about 979.2001167781.

The spelling of 938889257 in words is "nine hundred thirty-eight million, eight hundred eighty-nine thousand, two hundred fifty-seven".