1313011939 has 2 divisors, whose sum is σ = 1313011940. Its totient is φ = 1313011938.

The previous prime is 1313011919. The next prime is 1313011969. The reversal of 1313011939 is 9391103131.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (9391103131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1313011939 - 2⁵ = 1313011907 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1313011939.

It is not a weakly prime, because it can be changed into another prime (1313011919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656505969 + 656505970.

It is an arithmetic number, because the mean of its divisors is an integer number (656505970).

Almost surely, 2^1313011939 is an apocalyptic number.

1313011939 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313011939 is an equidigital number, since it uses as much as digits as its factorization.

1313011939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2187, while the sum is 31.

The square root of 1313011939 is about 36235.5066060901. The cubic root of 1313011939 is about 1095.0221186361.

The spelling of 1313011939 in words is "one billion, three hundred thirteen million, eleven thousand, nine hundred thirty-nine".