1572999979 has 2 divisors, whose sum is σ = 1572999980. Its totient is φ = 1572999978.

The previous prime is 1572999977. The next prime is 1572999997. The reversal of 1572999979 is 9799992751.

Together with next prime (1572999997) 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 1572999979 - 2¹ = 1572999977 is a prime.

Together with 1572999977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1572999977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 786499989 + 786499990.

It is an arithmetic number, because the mean of its divisors is an integer number (786499990).

Almost surely, 2^1572999979 is an apocalyptic number.

1572999979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1572999979 is an equidigital number, since it uses as much as digits as its factorization.

1572999979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28934010, while the sum is 67.

The square root of 1572999979 is about 39661.0637653606. The cubic root of 1572999979 is about 1162.9906922057.

The spelling of 1572999979 in words is "one billion, five hundred seventy-two million, nine hundred ninety-nine thousand, nine hundred seventy-nine".