1304857493 has 2 divisors, whose sum is σ = 1304857494. Its totient is φ = 1304857492.

The previous prime is 1304857469. The next prime is 1304857531. The reversal of 1304857493 is 3947584031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 963605764 + 341251729 = 31042^2 + 18473^2 .

It is a cyclic number.

It is not a de Polignac number, because 1304857493 - 2⁸ = 1304857237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1304857693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652428746 + 652428747.

It is an arithmetic number, because the mean of its divisors is an integer number (652428747).

Almost surely, 2^1304857493 is an apocalyptic number.

It is an amenable number.

1304857493 is a deficient number, since it is larger than the sum of its proper divisors (1).

1304857493 is an equidigital number, since it uses as much as digits as its factorization.

1304857493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 1304857493 is about 36122.8112554934. The cubic root of 1304857493 is about 1092.7505353608.

The spelling of 1304857493 in words is "one billion, three hundred four million, eight hundred fifty-seven thousand, four hundred ninety-three".