1038394457 has 2 divisors, whose sum is σ = 1038394458. Its totient is φ = 1038394456.

The previous prime is 1038394439. The next prime is 1038394471. The reversal of 1038394457 is 7544938301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1038386176 + 8281 = 32224^2 + 91^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1038394457 is a prime.

It is not a weakly prime, because it can be changed into another prime (1038394757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 519197228 + 519197229.

It is an arithmetic number, because the mean of its divisors is an integer number (519197229).

Almost surely, 2^1038394457 is an apocalyptic number.

It is an amenable number.

1038394457 is a deficient number, since it is larger than the sum of its proper divisors (1).

1038394457 is an equidigital number, since it uses as much as digits as its factorization.

1038394457 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 1038394457 is about 32224.1284909305. The cubic root of 1038394457 is about 1012.6377663883.

The spelling of 1038394457 in words is "one billion, thirty-eight million, three hundred ninety-four thousand, four hundred fifty-seven".