1303840457 has 2 divisors, whose sum is σ = 1303840458. Its totient is φ = 1303840456.

The previous prime is 1303840441. The next prime is 1303840459. The reversal of 1303840457 is 7540483031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1300395721 + 3444736 = 36061^2 + 1856^2 .

It is a cyclic number.

It is not a de Polignac number, because 1303840457 - 2⁴ = 1303840441 is a prime.

Together with 1303840459, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1303840459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 651920228 + 651920229.

It is an arithmetic number, because the mean of its divisors is an integer number (651920229).

Almost surely, 2^1303840457 is an apocalyptic number.

It is an amenable number.

1303840457 is a deficient number, since it is larger than the sum of its proper divisors (1).

1303840457 is an equidigital number, since it uses as much as digits as its factorization.

1303840457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 1303840457 is about 36108.7310355820. The cubic root of 1303840457 is about 1092.4665565851.

The spelling of 1303840457 in words is "one billion, three hundred three million, eight hundred forty thousand, four hundred fifty-seven".