138950569 has 2 divisors, whose sum is σ = 138950570. Its totient is φ = 138950568.

The previous prime is 138950561. The next prime is 138950579. The reversal of 138950569 is 965059831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127961344 + 10989225 = 11312^2 + 3315^2 .

It is a cyclic number.

It is not a de Polignac number, because 138950569 - 2³ = 138950561 is a prime.

It is a super-2 number, since 2×138950569² = 38614521250847522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (138950561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69475284 + 69475285.

It is an arithmetic number, because the mean of its divisors is an integer number (69475285).

Almost surely, 2^138950569 is an apocalyptic number.

It is an amenable number.

138950569 is a deficient number, since it is larger than the sum of its proper divisors (1).

138950569 is an equidigital number, since it uses as much as digits as its factorization.

138950569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 291600, while the sum is 46.

The square root of 138950569 is about 11787.7295947947. The cubic root of 138950569 is about 517.9487347585.

The spelling of 138950569 in words is "one hundred thirty-eight million, nine hundred fifty thousand, five hundred sixty-nine".