457642637 has 2 divisors, whose sum is σ = 457642638. Its totient is φ = 457642636.

The previous prime is 457642631. The next prime is 457642639. The reversal of 457642637 is 736246754.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 455651716 + 1990921 = 21346^2 + 1411^2 .

It is a cyclic number.

It is not a de Polignac number, because 457642637 - 2¹⁸ = 457380493 is a prime.

Together with 457642639, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (457642631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 228821318 + 228821319.

It is an arithmetic number, because the mean of its divisors is an integer number (228821319).

Almost surely, 2^457642637 is an apocalyptic number.

It is an amenable number.

457642637 is a deficient number, since it is larger than the sum of its proper divisors (1).

457642637 is an equidigital number, since it uses as much as digits as its factorization.

457642637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 846720, while the sum is 44.

The square root of 457642637 is about 21392.5836915507. The cubic root of 457642637 is about 770.6233424377.

The spelling of 457642637 in words is "four hundred fifty-seven million, six hundred forty-two thousand, six hundred thirty-seven".