1313231039 has 2 divisors, whose sum is σ = 1313231040. Its totient is φ = 1313231038.

The previous prime is 1313231033. The next prime is 1313231081. The reversal of 1313231039 is 9301323131.

It is a weak prime.

It is an emirp because it is prime and its reverse (9301323131) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1313231039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1313230999 and 1313231017.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1313231033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656615519 + 656615520.

It is an arithmetic number, because the mean of its divisors is an integer number (656615520).

Almost surely, 2^1313231039 is an apocalyptic number.

1313231039 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313231039 is an equidigital number, since it uses as much as digits as its factorization.

1313231039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 26.

The square root of 1313231039 is about 36238.5297577040. The cubic root of 1313231039 is about 1095.0830233888.

The spelling of 1313231039 in words is "one billion, three hundred thirteen million, two hundred thirty-one thousand, thirty-nine".