40646623 has 4 divisors (see below), whose sum is σ = 40737600. Its totient is φ = 40555648.

The previous prime is 40646597. The next prime is 40646629. The reversal of 40646623 is 32664604.

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 40646623 - 2⁵ = 40646591 is a prime.

It is a super-2 number, since 2×40646623² = 3304295922608258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40646629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44815 + ... + 45712.

It is an arithmetic number, because the mean of its divisors is an integer number (10184400).

Almost surely, 2^40646623 is an apocalyptic number.

40646623 is a deficient number, since it is larger than the sum of its proper divisors (90977).

40646623 is an equidigital number, since it uses as much as digits as its factorization.

40646623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90976.

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 40646623 is about 6375.4704140165. The cubic root of 40646623 is about 343.8281969540.

The spelling of 40646623 in words is "forty million, six hundred forty-six thousand, six hundred twenty-three".