139399430 has 8 divisors (see below), whose sum is σ = 250918992. Its totient is φ = 55759768.

The previous prime is 139399423. The next prime is 139399441. The reversal of 139399430 is 34993931.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6969962 + ... + 6969981.

It is an arithmetic number, because the mean of its divisors is an integer number (31364874).

Almost surely, 2^139399430 is an apocalyptic number.

139399430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139399430 is a deficient number, since it is larger than the sum of its proper divisors (111519562).

139399430 is a wasteful number, since it uses less digits than its factorization.

139399430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13939950.

The product of its (nonzero) digits is 78732, while the sum is 41.

The square root of 139399430 is about 11806.7535758141. The cubic root of 139399430 is about 518.5058563732.

The spelling of 139399430 in words is "one hundred thirty-nine million, three hundred ninety-nine thousand, four hundred thirty".