1154979979 has 2 divisors, whose sum is σ = 1154979980. Its totient is φ = 1154979978.

The previous prime is 1154979919. The next prime is 1154980019. The reversal of 1154979979 is 9799794511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1154979979 - 2⁷ = 1154979851 is a prime.

It is not a weakly prime, because it can be changed into another prime (1154979919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577489989 + 577489990.

It is an arithmetic number, because the mean of its divisors is an integer number (577489990).

Almost surely, 2^1154979979 is an apocalyptic number.

1154979979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1154979979 is an equidigital number, since it uses as much as digits as its factorization.

1154979979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6429780, while the sum is 61.

The square root of 1154979979 is about 33984.9963807560. The cubic root of 1154979979 is about 1049.1996861468.

The spelling of 1154979979 in words is "one billion, one hundred fifty-four million, nine hundred seventy-nine thousand, nine hundred seventy-nine".