40623643 has 2 divisors, whose sum is σ = 40623644. Its totient is φ = 40623642.

The previous prime is 40623607. The next prime is 40623673. The reversal of 40623643 is 34632604.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40623643 - 2¹³ = 40615451 is a prime.

It is not a weakly prime, because it can be changed into another prime (40623673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20311821 + 20311822.

It is an arithmetic number, because the mean of its divisors is an integer number (20311822).

Almost surely, 2^40623643 is an apocalyptic number.

40623643 is a deficient number, since it is larger than the sum of its proper divisors (1).

40623643 is an equidigital number, since it uses as much as digits as its factorization.

40623643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 28.

The square root of 40623643 is about 6373.6679392639. The cubic root of 40623643 is about 343.7633890983.

The spelling of 40623643 in words is "forty million, six hundred twenty-three thousand, six hundred forty-three".