125138623 has 2 divisors, whose sum is σ = 125138624. Its totient is φ = 125138622.

The previous prime is 125138609. The next prime is 125138641. The reversal of 125138623 is 326831521.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125138623 is a prime.

It is a super-2 number, since 2×125138623² = 31319349932672258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125138323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62569311 + 62569312.

It is an arithmetic number, because the mean of its divisors is an integer number (62569312).

Almost surely, 2^125138623 is an apocalyptic number.

125138623 is a deficient number, since it is larger than the sum of its proper divisors (1).

125138623 is an equidigital number, since it uses as much as digits as its factorization.

125138623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 31.

The square root of 125138623 is about 11186.5375787149. The cubic root of 125138623 is about 500.1847623840.

The spelling of 125138623 in words is "one hundred twenty-five million, one hundred thirty-eight thousand, six hundred twenty-three".