138795949 has 2 divisors, whose sum is σ = 138795950. Its totient is φ = 138795948.

The previous prime is 138795919. The next prime is 138795953. The reversal of 138795949 is 949597831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137124100 + 1671849 = 11710^2 + 1293^2 .

It is a cyclic number.

It is not a de Polignac number, because 138795949 - 2²³ = 130407341 is a prime.

It is a super-3 number, since 3×138795949³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 138795949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138795919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69397974 + 69397975.

It is an arithmetic number, because the mean of its divisors is an integer number (69397975).

Almost surely, 2^138795949 is an apocalyptic number.

It is an amenable number.

138795949 is a deficient number, since it is larger than the sum of its proper divisors (1).

138795949 is an equidigital number, since it uses as much as digits as its factorization.

138795949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2449440, while the sum is 55.

The square root of 138795949 is about 11781.1692543652. The cubic root of 138795949 is about 517.7565442124.

It can be divided in two parts, 1387 and 95949, that added together give a cube (97336 = 46³).

The spelling of 138795949 in words is "one hundred thirty-eight million, seven hundred ninety-five thousand, nine hundred forty-nine".