1173609979 has 2 divisors, whose sum is σ = 1173609980. Its totient is φ = 1173609978.

The previous prime is 1173609947. The next prime is 1173610003. The reversal of 1173609979 is 9799063711.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1173609979 - 2⁵ = 1173609947 is a prime.

It is not a weakly prime, because it can be changed into another prime (1173609779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 586804989 + 586804990.

It is an arithmetic number, because the mean of its divisors is an integer number (586804990).

Almost surely, 2^1173609979 is an apocalyptic number.

1173609979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1173609979 is an equidigital number, since it uses as much as digits as its factorization.

1173609979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 642978, while the sum is 52.

The square root of 1173609979 is about 34257.9914618473. The cubic root of 1173609979 is about 1054.8108730106.

The spelling of 1173609979 in words is "one billion, one hundred seventy-three million, six hundred nine thousand, nine hundred seventy-nine".