1504978879 has 2 divisors, whose sum is σ = 1504978880. Its totient is φ = 1504978878.

The previous prime is 1504978781. The next prime is 1504978897. The reversal of 1504978879 is 9788794051.

Together with next prime (1504978897) 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-1504978879 is a prime.

It is a super-2 number, since 2×1504978879² = 4529922852472193282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1504972879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 752489439 + 752489440.

It is an arithmetic number, because the mean of its divisors is an integer number (752489440).

Almost surely, 2^1504978879 is an apocalyptic number.

1504978879 is a deficient number, since it is larger than the sum of its proper divisors (1).

1504978879 is an equidigital number, since it uses as much as digits as its factorization.

1504978879 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5080320, while the sum is 58.

The square root of 1504978879 is about 38794.0572639676. The cubic root of 1504978879 is about 1145.9793757526.

The spelling of 1504978879 in words is "one billion, five hundred four million, nine hundred seventy-eight thousand, eight hundred seventy-nine".