238779811 has 2 divisors, whose sum is σ = 238779812. Its totient is φ = 238779810.

The previous prime is 238779799. The next prime is 238779829. The reversal of 238779811 is 118977832.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 238779811 - 2¹⁵ = 238747043 is a prime.

It is not a weakly prime, because it can be changed into another prime (238779851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119389905 + 119389906.

It is an arithmetic number, because the mean of its divisors is an integer number (119389906).

Almost surely, 2^238779811 is an apocalyptic number.

238779811 is a deficient number, since it is larger than the sum of its proper divisors (1).

238779811 is an equidigital number, since it uses as much as digits as its factorization.

238779811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 46.

The square root of 238779811 is about 15452.5017715579. The cubic root of 238779811 is about 620.3915416172.

The spelling of 238779811 in words is "two hundred thirty-eight million, seven hundred seventy-nine thousand, eight hundred eleven".