139197597 has 32 divisors (see below), whose sum is σ = 236335104. Its totient is φ = 70766400.

The previous prime is 139197577. The next prime is 139197647. The reversal of 139197597 is 795791931.

It is not a de Polignac number, because 139197597 - 2⁸ = 139197341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139197577) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4447 + ... + 17267.

It is an arithmetic number, because the mean of its divisors is an integer number (7385472).

Almost surely, 2^139197597 is an apocalyptic number.

It is an amenable number.

139197597 is a deficient number, since it is larger than the sum of its proper divisors (97137507).

139197597 is a wasteful number, since it uses less digits than its factorization.

139197597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12889.

The product of its digits is 535815, while the sum is 51.

The square root of 139197597 is about 11798.2031259001. The cubic root of 139197597 is about 518.2554915507.

The spelling of 139197597 in words is "one hundred thirty-nine million, one hundred ninety-seven thousand, five hundred ninety-seven".