1149640979 has 2 divisors, whose sum is σ = 1149640980. Its totient is φ = 1149640978.

The previous prime is 1149640951. The next prime is 1149640981. The reversal of 1149640979 is 9790469411.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (9790469411) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1149640979 is a prime.

Together with 1149640981, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1149640909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 574820489 + 574820490.

It is an arithmetic number, because the mean of its divisors is an integer number (574820490).

Almost surely, 2^1149640979 is an apocalyptic number.

1149640979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1149640979 is an equidigital number, since it uses as much as digits as its factorization.

1149640979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 489888, while the sum is 50.

The square root of 1149640979 is about 33906.3560265623. The cubic root of 1149640979 is about 1047.5805149975.

The spelling of 1149640979 in words is "one billion, one hundred forty-nine million, six hundred forty thousand, nine hundred seventy-nine".