8631457 has 4 divisors (see below), whose sum is σ = 8637460. Its totient is φ = 8625456.

The previous prime is 8631451. The next prime is 8631479. The reversal of 8631457 is 7541368.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 571536 + 8059921 = 756^2 + 2839^2 .

It is a cyclic number.

It is not a de Polignac number, because 8631457 - 2¹¹ = 8629409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8631451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 583 + ... + 4195.

It is an arithmetic number, because the mean of its divisors is an integer number (2159365).

Almost surely, 2^8631457 is an apocalyptic number.

It is an amenable number.

8631457 is a deficient number, since it is larger than the sum of its proper divisors (6003).

8631457 is a wasteful number, since it uses less digits than its factorization.

8631457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6002.

The product of its digits is 20160, while the sum is 34.

The square root of 8631457 is about 2937.9341381318. The cubic root of 8631457 is about 205.1294601663.

The spelling of 8631457 in words is "eight million, six hundred thirty-one thousand, four hundred fifty-seven".