979481491 has 2 divisors, whose sum is σ = 979481492. Its totient is φ = 979481490.

The previous prime is 979481471. The next prime is 979481527. The reversal of 979481491 is 194184979.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-979481491 is a prime.

It is not a weakly prime, because it can be changed into another prime (979481471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489740745 + 489740746.

It is an arithmetic number, because the mean of its divisors is an integer number (489740746).

Almost surely, 2^979481491 is an apocalyptic number.

979481491 is a deficient number, since it is larger than the sum of its proper divisors (1).

979481491 is an equidigital number, since it uses as much as digits as its factorization.

979481491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 52.

The square root of 979481491 is about 31296.6690080590. The cubic root of 979481491 is about 993.1131775534.

The spelling of 979481491 in words is "nine hundred seventy-nine million, four hundred eighty-one thousand, four hundred ninety-one".