64631123 has 4 divisors (see below), whose sum is σ = 64814568. Its totient is φ = 64447680.

The previous prime is 64631117. The next prime is 64631167. The reversal of 64631123 is 32113646.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64631123 - 2¹² = 64627027 is a prime.

It is a super-2 number, since 2×64631123² = 8354364120482258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64631092 and 64631101.

It is not an unprimeable number, because it can be changed into a prime (64631113) 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, 91193 + ... + 91898.

It is an arithmetic number, because the mean of its divisors is an integer number (16203642).

Almost surely, 2^64631123 is an apocalyptic number.

64631123 is a deficient number, since it is larger than the sum of its proper divisors (183445).

64631123 is a wasteful number, since it uses less digits than its factorization.

64631123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183444.

The product of its digits is 2592, while the sum is 26.

The square root of 64631123 is about 8039.3484188708. The cubic root of 64631123 is about 401.3105410991.

Adding to 64631123 its reverse (32113646), we get a palindrome (96744769).

The spelling of 64631123 in words is "sixty-four million, six hundred thirty-one thousand, one hundred twenty-three".