979091649 has 12 divisors (see below), whose sum is σ = 1463010900. Its totient is φ = 630219744.

The previous prime is 979091647. The next prime is 979091653. The reversal of 979091649 is 946190979.

It can be written as a sum of positive squares in 2 ways, for example, as 180633600 + 798458049 = 13440^2 + 28257^2 .

It is not a de Polignac number, because 979091649 - 2¹ = 979091647 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 979091595 and 979091604.

It is not an unprimeable number, because it can be changed into a prime (979091647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1875394 + ... + 1875915.

It is an arithmetic number, because the mean of its divisors is an integer number (121917575).

Almost surely, 2^979091649 is an apocalyptic number.

It is an amenable number.

979091649 is a deficient number, since it is larger than the sum of its proper divisors (483919251).

979091649 is a wasteful number, since it uses less digits than its factorization.

979091649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3751344 (or 3751341 counting only the distinct ones).

The product of its (nonzero) digits is 1102248, while the sum is 54.

The square root of 979091649 is about 31290.4402174210. The cubic root of 979091649 is about 992.9814042270.

The spelling of 979091649 in words is "nine hundred seventy-nine million, ninety-one thousand, six hundred forty-nine".