979921757 has 2 divisors, whose sum is σ = 979921758. Its totient is φ = 979921756.

The previous prime is 979921697. The next prime is 979921841. The reversal of 979921757 is 757129979.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 911677636 + 68244121 = 30194^2 + 8261^2 .

It is a cyclic number.

It is not a de Polignac number, because 979921757 - 2¹² = 979917661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (979921057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489960878 + 489960879.

It is an arithmetic number, because the mean of its divisors is an integer number (489960879).

Almost surely, 2^979921757 is an apocalyptic number.

It is an amenable number.

979921757 is a deficient number, since it is larger than the sum of its proper divisors (1).

979921757 is an equidigital number, since it uses as much as digits as its factorization.

979921757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2500470, while the sum is 56.

The square root of 979921757 is about 31303.7019695754. The cubic root of 979921757 is about 993.2619530283.

The spelling of 979921757 in words is "nine hundred seventy-nine million, nine hundred twenty-one thousand, seven hundred fifty-seven".