139092505 has 32 divisors (see below), whose sum is σ = 179417088. Its totient is φ = 103334400.

The previous prime is 139092461. The next prime is 139092517. The reversal of 139092505 is 505290931.

It is a happy number.

It is not a de Polignac number, because 139092505 - 2¹⁹ = 138568217 is a prime.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 444229 + ... + 444541.

It is an arithmetic number, because the mean of its divisors is an integer number (5606784).

Almost surely, 2^139092505 is an apocalyptic number.

It is an amenable number.

139092505 is a deficient number, since it is larger than the sum of its proper divisors (40324583).

139092505 is a wasteful number, since it uses less digits than its factorization.

139092505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457.

The product of its (nonzero) digits is 12150, while the sum is 34.

The square root of 139092505 is about 11793.7485559088. The cubic root of 139092505 is about 518.1250337945.

The spelling of 139092505 in words is "one hundred thirty-nine million, ninety-two thousand, five hundred five".