1015878013 has 2 divisors, whose sum is σ = 1015878014. Its totient is φ = 1015878012.

The previous prime is 1015877999. The next prime is 1015878037. The reversal of 1015878013 is 3108785101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 965779929 + 50098084 = 31077^2 + 7078^2 .

It is an emirp because it is prime and its reverse (3108785101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1015878013 - 2⁵ = 1015877981 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1015878013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1015878313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 507939006 + 507939007.

It is an arithmetic number, because the mean of its divisors is an integer number (507939007).

Almost surely, 2^1015878013 is an apocalyptic number.

It is an amenable number.

1015878013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1015878013 is an equidigital number, since it uses as much as digits as its factorization.

1015878013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 34.

The square root of 1015878013 is about 31872.8413072948. The cubic root of 1015878013 is about 1005.2649031485.

The spelling of 1015878013 in words is "one billion, fifteen million, eight hundred seventy-eight thousand, thirteen".