979517641 has 2 divisors, whose sum is σ = 979517642. Its totient is φ = 979517640.

The previous prime is 979517579. The next prime is 979517657. The reversal of 979517641 is 146715979.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 552062016 + 427455625 = 23496^2 + 20675^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-979517641 is a prime.

It is not a weakly prime, because it can be changed into another prime (979517681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489758820 + 489758821.

It is an arithmetic number, because the mean of its divisors is an integer number (489758821).

Almost surely, 2^979517641 is an apocalyptic number.

It is an amenable number.

979517641 is a deficient number, since it is larger than the sum of its proper divisors (1).

979517641 is an equidigital number, since it uses as much as digits as its factorization.

979517641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 476280, while the sum is 49.

The square root of 979517641 is about 31297.2465402310. The cubic root of 979517641 is about 993.1253951059.

The spelling of 979517641 in words is "nine hundred seventy-nine million, five hundred seventeen thousand, six hundred forty-one".