139623297 has 16 divisors (see below), whose sum is σ = 203366592. Its totient is φ = 84504320.

The previous prime is 139623277. The next prime is 139623299. The reversal of 139623297 is 792326931.

It is a cyclic number.

It is not a de Polignac number, because 139623297 - 2¹¹ = 139621249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139623299) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25813 + ... + 30749.

It is an arithmetic number, because the mean of its divisors is an integer number (12710412).

Almost surely, 2^139623297 is an apocalyptic number.

It is an amenable number.

139623297 is a deficient number, since it is larger than the sum of its proper divisors (63743295).

139623297 is a wasteful number, since it uses less digits than its factorization.

139623297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5808.

The product of its digits is 122472, while the sum is 42.

The square root of 139623297 is about 11816.2302364164. The cubic root of 139623297 is about 518.7832708713.

The spelling of 139623297 in words is "one hundred thirty-nine million, six hundred twenty-three thousand, two hundred ninety-seven".