1154979919 has 2 divisors, whose sum is σ = 1154979920. Its totient is φ = 1154979918.

The previous prime is 1154979899. The next prime is 1154979979. The reversal of 1154979919 is 9199794511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1154979919 - 2⁵ = 1154979887 is a prime.

It is a super-2 number, since 2×1154979919² = 2667957226586493122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1154979919.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1154979979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577489959 + 577489960.

It is an arithmetic number, because the mean of its divisors is an integer number (577489960).

Almost surely, 2^1154979919 is an apocalyptic number.

1154979919 is a deficient number, since it is larger than the sum of its proper divisors (1).

1154979919 is an equidigital number, since it uses as much as digits as its factorization.

1154979919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 918540, while the sum is 55.

The square root of 1154979919 is about 33984.9954980135. The cubic root of 1154979919 is about 1049.1996679785.

The spelling of 1154979919 in words is "one billion, one hundred fifty-four million, nine hundred seventy-nine thousand, nine hundred nineteen".