238979137 has 2 divisors, whose sum is σ = 238979138. Its totient is φ = 238979136.

The previous prime is 238979129. The next prime is 238979159. The reversal of 238979137 is 731979832.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 194769936 + 44209201 = 13956^2 + 6649^2 .

It is a cyclic number.

It is not a de Polignac number, because 238979137 - 2³ = 238979129 is a prime.

It is a super-2 number, since 2×238979137² = 114222055842529538, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (238979107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119489568 + 119489569.

It is an arithmetic number, because the mean of its divisors is an integer number (119489569).

Almost surely, 2^238979137 is an apocalyptic number.

It is an amenable number.

238979137 is a deficient number, since it is larger than the sum of its proper divisors (1).

238979137 is an equidigital number, since it uses as much as digits as its factorization.

238979137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 571536, while the sum is 49.

The square root of 238979137 is about 15458.9500613722. The cubic root of 238979137 is about 620.5641214941.

The spelling of 238979137 in words is "two hundred thirty-eight million, nine hundred seventy-nine thousand, one hundred thirty-seven".