979775997 has 8 divisors (see below), whose sum is σ = 1324263744. Its totient is φ = 644236128.

The previous prime is 979775981. The next prime is 979776001. The reversal of 979775997 is 799577979.

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

It is not a de Polignac number, because 979775997 - 2⁴ = 979775981 is a prime.

It is a super-2 number, since 2×979775997² = 1919922008594688018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (979775497) 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, 2236713 + ... + 2237150.

It is an arithmetic number, because the mean of its divisors is an integer number (165532968).

Almost surely, 2^979775997 is an apocalyptic number.

It is an amenable number.

979775997 is a deficient number, since it is larger than the sum of its proper divisors (344487747).

979775997 is a wasteful number, since it uses less digits than its factorization.

979775997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4473939.

The product of its digits is 78764805, while the sum is 69.

The square root of 979775997 is about 31301.3737238480. The cubic root of 979775997 is about 993.2127024835.

The spelling of 979775997 in words is "nine hundred seventy-nine million, seven hundred seventy-five thousand, nine hundred ninety-seven".