1520488979 has 2 divisors, whose sum is σ = 1520488980. Its totient is φ = 1520488978.

The previous prime is 1520488973. The next prime is 1520488997. The reversal of 1520488979 is 9798840251.

Together with next prime (1520488997) 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 a de Polignac number, because none of the positive numbers 2^k-1520488979 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1520488979.

It is not a weakly prime, because it can be changed into another prime (1520488973) 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, 760244489 + 760244490.

It is an arithmetic number, because the mean of its divisors is an integer number (760244490).

Almost surely, 2^1520488979 is an apocalyptic number.

1520488979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1520488979 is an equidigital number, since it uses as much as digits as its factorization.

1520488979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1451520, while the sum is 53.

The square root of 1520488979 is about 38993.4478983329. The cubic root of 1520488979 is about 1149.9026959889.

The spelling of 1520488979 in words is "one billion, five hundred twenty million, four hundred eighty-eight thousand, nine hundred seventy-nine".