139504389 has 8 divisors (see below), whose sum is σ = 187426272. Its totient is φ = 92292720.

The previous prime is 139504381. The next prime is 139504399. The reversal of 139504389 is 983405931.

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

It is not a de Polignac number, because 139504389 - 2³ = 139504381 is a prime.

It is a super-2 number, since 2×139504389² = 38922949100526642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 139504389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139504381) 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, 177094 + ... + 177879.

It is an arithmetic number, because the mean of its divisors is an integer number (23428284).

Almost surely, 2^139504389 is an apocalyptic number.

It is an amenable number.

139504389 is a deficient number, since it is larger than the sum of its proper divisors (47921883).

139504389 is a wasteful number, since it uses less digits than its factorization.

139504389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355107.

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 139504389 is about 11811.1976107421. The cubic root of 139504389 is about 518.6359578214.

The spelling of 139504389 in words is "one hundred thirty-nine million, five hundred four thousand, three hundred eighty-nine".