15454979 has 2 divisors, whose sum is σ = 15454980. Its totient is φ = 15454978.

The previous prime is 15454951. The next prime is 15454997. The reversal of 15454979 is 97945451.

Together with next prime (15454997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15454979 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15454949) 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, 7727489 + 7727490.

It is an arithmetic number, because the mean of its divisors is an integer number (7727490).

Almost surely, 2^15454979 is an apocalyptic number.

15454979 is a deficient number, since it is larger than the sum of its proper divisors (1).

15454979 is an equidigital number, since it uses as much as digits as its factorization.

15454979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 226800, while the sum is 44.

The square root of 15454979 is about 3931.2821063872. The cubic root of 15454979 is about 249.0899123152.

The spelling of 15454979 in words is "fifteen million, four hundred fifty-four thousand, nine hundred seventy-nine".