138597952 has 14 divisors (see below), whose sum is σ = 275030438. Its totient is φ = 69298944.

The previous prime is 138597947. The next prime is 138597959. The reversal of 138597952 is 259795831.

It can be written as a sum of positive squares in only one way, i.e., 70963776 + 67634176 = 8424^2 + 8224^2 .

It is a junction number, because it is equal to n+sod(n) for n = 138597896 and 138597905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138597959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1082733 + ... + 1082860.

Almost surely, 2^138597952 is an apocalyptic number.

It is an amenable number.

138597952 is a deficient number, since it is larger than the sum of its proper divisors (136432486).

138597952 is an equidigital number, since it uses as much as digits as its factorization.

138597952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2165605 (or 2165595 counting only the distinct ones).

The product of its digits is 680400, while the sum is 49.

The square root of 138597952 is about 11772.7631421005. The cubic root of 138597952 is about 517.5102281190.

The spelling of 138597952 in words is "one hundred thirty-eight million, five hundred ninety-seven thousand, nine hundred fifty-two".