138074977 has 2 divisors, whose sum is σ = 138074978. Its totient is φ = 138074976.

The previous prime is 138074971. The next prime is 138074999. The reversal of 138074977 is 779470831.

138074977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94303521 + 43771456 = 9711^2 + 6616^2 .

It is a cyclic number.

It is not a de Polignac number, because 138074977 - 2¹⁵ = 138042209 is a prime.

It is not a weakly prime, because it can be changed into another prime (138074971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69037488 + 69037489.

It is an arithmetic number, because the mean of its divisors is an integer number (69037489).

Almost surely, 2^138074977 is an apocalyptic number.

It is an amenable number.

138074977 is a deficient number, since it is larger than the sum of its proper divisors (1).

138074977 is an equidigital number, since it uses as much as digits as its factorization.

138074977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 296352, while the sum is 46.

The square root of 138074977 is about 11750.5309241753. The cubic root of 138074977 is about 516.8584964174.

The spelling of 138074977 in words is "one hundred thirty-eight million, seventy-four thousand, nine hundred seventy-seven".