938913257 has 2 divisors, whose sum is σ = 938913258. Its totient is φ = 938913256.

The previous prime is 938913211. The next prime is 938913293. The reversal of 938913257 is 752319839.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 891082201 + 47831056 = 29851^2 + 6916^2 .

It is a cyclic number.

It is not a de Polignac number, because 938913257 - 2¹² = 938909161 is a prime.

It is a Chen prime.

It is equal to p_47895086 and since 938913257 and 47895086 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (938913457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 469456628 + 469456629.

It is an arithmetic number, because the mean of its divisors is an integer number (469456629).

Almost surely, 2^938913257 is an apocalyptic number.

It is an amenable number.

938913257 is a deficient number, since it is larger than the sum of its proper divisors (1).

938913257 is an equidigital number, since it uses as much as digits as its factorization.

938913257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 408240, while the sum is 47.

The square root of 938913257 is about 30641.6914839896. The cubic root of 938913257 is about 979.2084601840.

The spelling of 938913257 in words is "nine hundred thirty-eight million, nine hundred thirteen thousand, two hundred fifty-seven".