238737139 has 2 divisors, whose sum is σ = 238737140. Its totient is φ = 238737138.

The previous prime is 238737119. The next prime is 238737173. The reversal of 238737139 is 931737832.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 238737139 - 2¹³ = 238728947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 238737095 and 238737104.

It is not a weakly prime, because it can be changed into another prime (238737119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119368569 + 119368570.

It is an arithmetic number, because the mean of its divisors is an integer number (119368570).

Almost surely, 2^238737139 is an apocalyptic number.

238737139 is a deficient number, since it is larger than the sum of its proper divisors (1).

238737139 is an equidigital number, since it uses as much as digits as its factorization.

238737139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 43.

The square root of 238737139 is about 15451.1209625710. The cubic root of 238737139 is about 620.3545829859.

The spelling of 238737139 in words is "two hundred thirty-eight million, seven hundred thirty-seven thousand, one hundred thirty-nine".