138895751 has 2 divisors, whose sum is σ = 138895752. Its totient is φ = 138895750.

The previous prime is 138895739. The next prime is 138895777. The reversal of 138895751 is 157598831.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138895751 - 2¹⁰ = 138894727 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 138895696 and 138895705.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138895711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69447875 + 69447876.

It is an arithmetic number, because the mean of its divisors is an integer number (69447876).

Almost surely, 2^138895751 is an apocalyptic number.

138895751 is a deficient number, since it is larger than the sum of its proper divisors (1).

138895751 is an equidigital number, since it uses as much as digits as its factorization.

138895751 is an evil number, because the sum of its binary digits is even.

The product of its digits is 302400, while the sum is 47.

The square root of 138895751 is about 11785.4041508978. The cubic root of 138895751 is about 517.8806130551.

The spelling of 138895751 in words is "one hundred thirty-eight million, eight hundred ninety-five thousand, seven hundred fifty-one".