1307646397 has 2 divisors, whose sum is σ = 1307646398. Its totient is φ = 1307646396.

The previous prime is 1307646377. The next prime is 1307646407. The reversal of 1307646397 is 7936467031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1292114916 + 15531481 = 35946^2 + 3941^2 .

It is a cyclic number.

It is not a de Polignac number, because 1307646397 - 2⁷ = 1307646269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1307646377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 653823198 + 653823199.

It is an arithmetic number, because the mean of its divisors is an integer number (653823199).

Almost surely, 2^1307646397 is an apocalyptic number.

It is an amenable number.

1307646397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1307646397 is an equidigital number, since it uses as much as digits as its factorization.

1307646397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 571536, while the sum is 46.

The square root of 1307646397 is about 36161.3937369676. The cubic root of 1307646397 is about 1093.5285022295.

The spelling of 1307646397 in words is "one billion, three hundred seven million, six hundred forty-six thousand, three hundred ninety-seven".