40194923 has 2 divisors, whose sum is σ = 40194924. Its totient is φ = 40194922.

The previous prime is 40194911. The next prime is 40194943. The reversal of 40194923 is 32949104.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40194923 - 2⁴ = 40194907 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40194923.

It is not a weakly prime, because it can be changed into another prime (40194943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20097461 + 20097462.

It is an arithmetic number, because the mean of its divisors is an integer number (20097462).

Almost surely, 2^40194923 is an apocalyptic number.

40194923 is a deficient number, since it is larger than the sum of its proper divisors (1).

40194923 is an equidigital number, since it uses as much as digits as its factorization.

40194923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 40194923 is about 6339.9466086080. The cubic root of 40194923 is about 342.5498121382.

The spelling of 40194923 in words is "forty million, one hundred ninety-four thousand, nine hundred twenty-three".