138164501 has 2 divisors, whose sum is σ = 138164502. Its totient is φ = 138164500.

The previous prime is 138164483. The next prime is 138164557. The reversal of 138164501 is 105461831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137710225 + 454276 = 11735^2 + 674^2 .

It is a cyclic number.

It is not a de Polignac number, because 138164501 - 2¹⁴ = 138148117 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 (138164581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69082250 + 69082251.

It is an arithmetic number, because the mean of its divisors is an integer number (69082251).

Almost surely, 2^138164501 is an apocalyptic number.

It is an amenable number.

138164501 is a deficient number, since it is larger than the sum of its proper divisors (1).

138164501 is an equidigital number, since it uses as much as digits as its factorization.

138164501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 138164501 is about 11754.3396666933. The cubic root of 138164501 is about 516.9701778732.

The spelling of 138164501 in words is "one hundred thirty-eight million, one hundred sixty-four thousand, five hundred one".