1501396979 has 2 divisors, whose sum is σ = 1501396980. Its totient is φ = 1501396978.

The previous prime is 1501396969. The next prime is 1501396997. The reversal of 1501396979 is 9796931051.

Together with next prime (1501396997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1501396979 - 2²⁰ = 1500348403 is a prime.

It is not a weakly prime, because it can be changed into another prime (1501396909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 750698489 + 750698490.

It is an arithmetic number, because the mean of its divisors is an integer number (750698490).

Almost surely, 2^1501396979 is an apocalyptic number.

1501396979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1501396979 is an equidigital number, since it uses as much as digits as its factorization.

1501396979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 459270, while the sum is 50.

The square root of 1501396979 is about 38747.8641863006. The cubic root of 1501396979 is about 1145.0694971261.

The spelling of 1501396979 in words is "one billion, five hundred one million, three hundred ninety-six thousand, nine hundred seventy-nine".