979012409 has 2 divisors, whose sum is σ = 979012410. Its totient is φ = 979012408.

The previous prime is 979012361. The next prime is 979012453. The reversal of 979012409 is 904210979.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 900300025 + 78712384 = 30005^2 + 8872^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-979012409 is a prime.

It is not a weakly prime, because it can be changed into another prime (979012499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489506204 + 489506205.

It is an arithmetic number, because the mean of its divisors is an integer number (489506205).

Almost surely, 2^979012409 is an apocalyptic number.

It is an amenable number.

979012409 is a deficient number, since it is larger than the sum of its proper divisors (1).

979012409 is an equidigital number, since it uses as much as digits as its factorization.

979012409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 979012409 is about 31289.1739903756. The cubic root of 979012409 is about 992.9546154617.

The spelling of 979012409 in words is "nine hundred seventy-nine million, twelve thousand, four hundred nine".