716121605 has 16 divisors (see below), whose sum is σ = 877537584. Its totient is φ = 560885760.

The previous prime is 716121589. The next prime is 716121641. The reversal of 716121605 is 506121617.

It can be written as a sum of positive squares in 8 ways, for example, as 76335169 + 639786436 = 8737^2 + 25294^2 .

It is not a de Polignac number, because 716121605 - 2⁴ = 716121589 is a prime.

It is a Duffinian number.

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, 42845 + ... + 57165.

It is an arithmetic number, because the mean of its divisors is an integer number (54846099).

Almost surely, 2^716121605 is an apocalyptic number.

It is an amenable number.

716121605 is a deficient number, since it is larger than the sum of its proper divisors (161415979).

716121605 is a wasteful number, since it uses less digits than its factorization.

716121605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14536.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 716121605 is about 26760.4485201575. The cubic root of 716121605 is about 894.6687308496.

The spelling of 716121605 in words is "seven hundred sixteen million, one hundred twenty-one thousand, six hundred five".