139617399 has 4 divisors (see below), whose sum is σ = 186156536. Its totient is φ = 93078264.

The previous prime is 139617389. The next prime is 139617409. The reversal of 139617399 is 993716931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 993716931 = 3 ⋅331238977.

It is an interprime number because it is at equal distance from previous prime (139617389) and next prime (139617409).

It is not a de Polignac number, because 139617399 - 2⁵ = 139617367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139617319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23269564 + ... + 23269569.

It is an arithmetic number, because the mean of its divisors is an integer number (46539134).

Almost surely, 2^139617399 is an apocalyptic number.

139617399 is a deficient number, since it is larger than the sum of its proper divisors (46539137).

139617399 is an equidigital number, since it uses as much as digits as its factorization.

139617399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46539136.

The product of its digits is 275562, while the sum is 48.

The square root of 139617399 is about 11815.9806617987. The cubic root of 139617399 is about 518.7759659137.

The spelling of 139617399 in words is "one hundred thirty-nine million, six hundred seventeen thousand, three hundred ninety-nine".