717138906 has 32 divisors (see below), whose sum is σ = 1578529728. Its totient is φ = 215389440.

The previous prime is 717138871. The next prime is 717138953. The reversal of 717138906 is 609831717.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40621 + ... + 55536.

It is an arithmetic number, because the mean of its divisors is an integer number (49329054).

Almost surely, 2^717138906 is an apocalyptic number.

717138906 is an abundant number, since it is smaller than the sum of its proper divisors (861390822).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

717138906 is a wasteful number, since it uses less digits than its factorization.

717138906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96286.

The product of its (nonzero) digits is 63504, while the sum is 42.

The square root of 717138906 is about 26779.4493221948. The cubic root of 717138906 is about 895.0921769757.

The spelling of 717138906 in words is "seven hundred seventeen million, one hundred thirty-eight thousand, nine hundred six".