238492913 has 2 divisors, whose sum is σ = 238492914. Its totient is φ = 238492912.

The previous prime is 238492901. The next prime is 238492937. The reversal of 238492913 is 319294832.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 168402529 + 70090384 = 12977^2 + 8372^2 .

It is a cyclic number.

It is not a de Polignac number, because 238492913 - 2¹⁴ = 238476529 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (238492013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119246456 + 119246457.

It is an arithmetic number, because the mean of its divisors is an integer number (119246457).

Almost surely, 2^238492913 is an apocalyptic number.

It is an amenable number.

238492913 is a deficient number, since it is larger than the sum of its proper divisors (1).

238492913 is an equidigital number, since it uses as much as digits as its factorization.

238492913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 41.

The square root of 238492913 is about 15443.2157596791. The cubic root of 238492913 is about 620.1429717109.

It can be divided in two parts, 23849 and 2913, that added together give a palindrome (26762).

The spelling of 238492913 in words is "two hundred thirty-eight million, four hundred ninety-two thousand, nine hundred thirteen".