238644379 has 2 divisors, whose sum is σ = 238644380. Its totient is φ = 238644378.

The previous prime is 238644349. The next prime is 238644391. The reversal of 238644379 is 973446832.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 238644379 - 2²³ = 230255771 is a prime.

It is a super-2 number, since 2×238644379² = 113902279256591282, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (238644349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119322189 + 119322190.

It is an arithmetic number, because the mean of its divisors is an integer number (119322190).

Almost surely, 2^238644379 is an apocalyptic number.

238644379 is a deficient number, since it is larger than the sum of its proper divisors (1).

238644379 is an equidigital number, since it uses as much as digits as its factorization.

238644379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 46.

The square root of 238644379 is about 15448.1189469786. The cubic root of 238644379 is about 620.2742274593.

The spelling of 238644379 in words is "two hundred thirty-eight million, six hundred forty-four thousand, three hundred seventy-nine".