2154861179 has 2 divisors, whose sum is σ = 2154861180. Its totient is φ = 2154861178.

The previous prime is 2154861161. The next prime is 2154861187. The reversal of 2154861179 is 9711684512.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2154861179 is a prime.

It is a super-2 number, since 2×2154861179² = 9286853401522540082, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2154861109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077430589 + 1077430590.

It is an arithmetic number, because the mean of its divisors is an integer number (1077430590).

Almost surely, 2^2154861179 is an apocalyptic number.

2154861179 is a deficient number, since it is larger than the sum of its proper divisors (1).

2154861179 is an equidigital number, since it uses as much as digits as its factorization.

2154861179 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 44.

The square root of 2154861179 is about 46420.4823219234. The cubic root of 2154861179 is about 1291.6348838650.

The spelling of 2154861179 in words is "two billion, one hundred fifty-four million, eight hundred sixty-one thousand, one hundred seventy-nine".