239691077 has 2 divisors, whose sum is σ = 239691078. Its totient is φ = 239691076.

The previous prime is 239691059. The next prime is 239691097. The reversal of 239691077 is 770196932.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 227677921 + 12013156 = 15089^2 + 3466^2 .

It is a cyclic number.

It is not a de Polignac number, because 239691077 - 2¹⁰ = 239690053 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (239691097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119845538 + 119845539.

It is an arithmetic number, because the mean of its divisors is an integer number (119845539).

Almost surely, 2^239691077 is an apocalyptic number.

It is an amenable number.

239691077 is a deficient number, since it is larger than the sum of its proper divisors (1).

239691077 is an equidigital number, since it uses as much as digits as its factorization.

239691077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 142884, while the sum is 44.

The square root of 239691077 is about 15481.9597273730. The cubic root of 239691077 is about 621.1797490422.

The spelling of 239691077 in words is "two hundred thirty-nine million, six hundred ninety-one thousand, seventy-seven".