1310439997 has 2 divisors, whose sum is σ = 1310439998. Its totient is φ = 1310439996.

The previous prime is 1310439979. The next prime is 1310440031. The reversal of 1310439997 is 7999340131.

Together with previous prime (1310439979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 793605241 + 516834756 = 28171^2 + 22734^2 .

It is a cyclic number.

It is not a de Polignac number, because 1310439997 - 2²³ = 1302051389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1310439797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655219998 + 655219999.

It is an arithmetic number, because the mean of its divisors is an integer number (655219999).

Almost surely, 2^1310439997 is an apocalyptic number.

It is an amenable number.

1310439997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1310439997 is an equidigital number, since it uses as much as digits as its factorization.

1310439997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 183708, while the sum is 46.

The square root of 1310439997 is about 36199.9999585635. Note that the first 4 decimals coincide. The cubic root of 1310439997 is about 1094.3066708969.

The spelling of 1310439997 in words is "one billion, three hundred ten million, four hundred thirty-nine thousand, nine hundred ninety-seven".