139262906 has 16 divisors (see below), whose sum is σ = 213208200. Its totient is φ = 68198208.

The previous prime is 139262899. The next prime is 139262923. The reversal of 139262906 is 609262931.

It can be written as a sum of positive squares in 4 ways, for example, as 139027681 + 235225 = 11791^2 + 485^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 139262906.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112700 + ... + 113928.

Almost surely, 2^139262906 is an apocalyptic number.

139262906 is a deficient number, since it is larger than the sum of its proper divisors (73945294).

139262906 is a wasteful number, since it uses less digits than its factorization.

139262906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2353.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 139262906 is about 11800.9705533062. The cubic root of 139262906 is about 518.3365309186.

The spelling of 139262906 in words is "one hundred thirty-nine million, two hundred sixty-two thousand, nine hundred six".