1304136397 has 2 divisors, whose sum is σ = 1304136398. Its totient is φ = 1304136396.

The previous prime is 1304136289. The next prime is 1304136403. The reversal of 1304136397 is 7936314031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1210065796 + 94070601 = 34786^2 + 9699^2 .

It is a cyclic number.

It is not a de Polignac number, because 1304136397 - 2²⁷ = 1169918669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1304136697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652068198 + 652068199.

It is an arithmetic number, because the mean of its divisors is an integer number (652068199).

Almost surely, 2^1304136397 is an apocalyptic number.

It is an amenable number.

1304136397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1304136397 is an equidigital number, since it uses as much as digits as its factorization.

1304136397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 37.

The square root of 1304136397 is about 36112.8287039384. The cubic root of 1304136397 is about 1092.5492047581.

The spelling of 1304136397 in words is "one billion, three hundred four million, one hundred thirty-six thousand, three hundred ninety-seven".