138990597 has 8 divisors (see below), whose sum is σ = 185442144. Its totient is φ = 92599728.

The previous prime is 138990583. The next prime is 138990601. The reversal of 138990597 is 795099831.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-138990597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138990547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9523 + ... + 19200.

It is an arithmetic number, because the mean of its divisors is an integer number (23180268).

Almost surely, 2^138990597 is an apocalyptic number.

It is an amenable number.

138990597 is a deficient number, since it is larger than the sum of its proper divisors (46451547).

138990597 is a wasteful number, since it uses less digits than its factorization.

138990597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30339.

The product of its (nonzero) digits is 612360, while the sum is 51.

The square root of 138990597 is about 11789.4273397820. The cubic root of 138990597 is about 517.9984657806.

The spelling of 138990597 in words is "one hundred thirty-eight million, nine hundred ninety thousand, five hundred ninety-seven".