1313101997 has 2 divisors, whose sum is σ = 1313101998. Its totient is φ = 1313101996.

The previous prime is 1313101987. The next prime is 1313102017. The reversal of 1313101997 is 7991013131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1220384356 + 92717641 = 34934^2 + 9629^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1313101997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1313101927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656550998 + 656550999.

It is an arithmetic number, because the mean of its divisors is an integer number (656550999).

Almost surely, 2^1313101997 is an apocalyptic number.

It is an amenable number.

1313101997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313101997 is an equidigital number, since it uses as much as digits as its factorization.

1313101997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5103, while the sum is 35.

The square root of 1313101997 is about 36236.7492609367. The cubic root of 1313101997 is about 1095.0471535055.

The spelling of 1313101997 in words is "one billion, three hundred thirteen million, one hundred one thousand, nine hundred ninety-seven".