40878923 has 2 divisors, whose sum is σ = 40878924. Its totient is φ = 40878922.

The previous prime is 40878919. The next prime is 40878947. The reversal of 40878923 is 32987804.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40878923 - 2² = 40878919 is a prime.

It is not a weakly prime, because it can be changed into another prime (40878983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20439461 + 20439462.

It is an arithmetic number, because the mean of its divisors is an integer number (20439462).

Almost surely, 2^40878923 is an apocalyptic number.

40878923 is a deficient number, since it is larger than the sum of its proper divisors (1).

40878923 is an equidigital number, since it uses as much as digits as its factorization.

40878923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 40878923 is about 6393.6627217894. The cubic root of 40878923 is about 344.4819586343.

The spelling of 40878923 in words is "forty million, eight hundred seventy-eight thousand, nine hundred twenty-three".