997501679 has 8 divisors (see below), whose sum is σ = 1005950400. Its totient is φ = 989085600.

The previous prime is 997501657. The next prime is 997501709. The reversal of 997501679 is 976105799.

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

It is a cyclic number.

It is not a de Polignac number, because 997501679 - 2¹² = 997497583 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 997501679.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997501279) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55274 + ... + 71064.

It is an arithmetic number, because the mean of its divisors is an integer number (125743800).

Almost surely, 2^997501679 is an apocalyptic number.

997501679 is a deficient number, since it is larger than the sum of its proper divisors (8448721).

997501679 is a wasteful number, since it uses less digits than its factorization.

997501679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16321.

The product of its (nonzero) digits is 1071630, while the sum is 53.

The square root of 997501679 is about 31583.2499752638. The cubic root of 997501679 is about 999.1665318572.

The spelling of 997501679 in words is "nine hundred ninety-seven million, five hundred one thousand, six hundred seventy-nine".