457633661 has 2 divisors, whose sum is σ = 457633662. Its totient is φ = 457633660.

The previous prime is 457633643. The next prime is 457633667. The reversal of 457633661 is 166336754.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 266668900 + 190964761 = 16330^2 + 13819^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-457633661 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (457633667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 228816830 + 228816831.

It is an arithmetic number, because the mean of its divisors is an integer number (228816831).

Almost surely, 2^457633661 is an apocalyptic number.

It is an amenable number.

457633661 is a deficient number, since it is larger than the sum of its proper divisors (1).

457633661 is an equidigital number, since it uses as much as digits as its factorization.

457633661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 41.

The square root of 457633661 is about 21392.3738981909. The cubic root of 457633661 is about 770.6183041831.

The spelling of 457633661 in words is "four hundred fifty-seven million, six hundred thirty-three thousand, six hundred sixty-one".