1345683457 has 2 divisors, whose sum is σ = 1345683458. Its totient is φ = 1345683456.

The previous prime is 1345683431. The next prime is 1345683497. The reversal of 1345683457 is 7543865431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 899460081 + 446223376 = 29991^2 + 21124^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1345683457 is a prime.

It is not a weakly prime, because it can be changed into another prime (1345683497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672841728 + 672841729.

It is an arithmetic number, because the mean of its divisors is an integer number (672841729).

Almost surely, 2^1345683457 is an apocalyptic number.

It is an amenable number.

1345683457 is a deficient number, since it is larger than the sum of its proper divisors (1).

1345683457 is an equidigital number, since it uses as much as digits as its factorization.

1345683457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1209600, while the sum is 46.

The square root of 1345683457 is about 36683.5584015510. The cubic root of 1345683457 is about 1104.0302451916.

The spelling of 1345683457 in words is "one billion, three hundred forty-five million, six hundred eighty-three thousand, four hundred fifty-seven".