138177659 has 2 divisors, whose sum is σ = 138177660. Its totient is φ = 138177658.

The previous prime is 138177623. The next prime is 138177691. The reversal of 138177659 is 956771831.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138177659 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (138177059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69088829 + 69088830.

It is an arithmetic number, because the mean of its divisors is an integer number (69088830).

Almost surely, 2^138177659 is an apocalyptic number.

138177659 is a deficient number, since it is larger than the sum of its proper divisors (1).

138177659 is an equidigital number, since it uses as much as digits as its factorization.

138177659 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 317520, while the sum is 47.

The square root of 138177659 is about 11754.8993615428. The cubic root of 138177659 is about 516.9865884505.

The spelling of 138177659 in words is "one hundred thirty-eight million, one hundred seventy-seven thousand, six hundred fifty-nine".