997722715 has 8 divisors (see below), whose sum is σ = 1306109808. Its totient is φ = 725616480.

The previous prime is 997722709. The next prime is 997722749. The reversal of 997722715 is 517227799.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 997722715 - 2⁵ = 997722683 is a prime.

It is a Duffinian number.

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, 9070152 + ... + 9070261.

It is an arithmetic number, because the mean of its divisors is an integer number (163263726).

Almost surely, 2^997722715 is an apocalyptic number.

997722715 is a deficient number, since it is larger than the sum of its proper divisors (308387093).

997722715 is a wasteful number, since it uses less digits than its factorization.

997722715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18140429.

The product of its digits is 555660, while the sum is 49.

The square root of 997722715 is about 31586.7490413306. The cubic root of 997722715 is about 999.2403280447.

The spelling of 997722715 in words is "nine hundred ninety-seven million, seven hundred twenty-two thousand, seven hundred fifteen".