139632805 has 16 divisors (see below), whose sum is σ = 189947520. Its totient is φ = 97685568.

The previous prime is 139632799. The next prime is 139632821. The reversal of 139632805 is 508236931.

It is a cyclic number.

It is not a de Polignac number, because 139632805 - 2³ = 139632797 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55297 + ... + 57766.

It is an arithmetic number, because the mean of its divisors is an integer number (11871720).

Almost surely, 2^139632805 is an apocalyptic number.

It is an amenable number.

139632805 is a deficient number, since it is larger than the sum of its proper divisors (50314715).

139632805 is a wasteful number, since it uses less digits than its factorization.

139632805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113100.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 139632805 is about 11816.6325575436. The cubic root of 139632805 is about 518.7950465551.

The spelling of 139632805 in words is "one hundred thirty-nine million, six hundred thirty-two thousand, eight hundred five".