40394911 has 2 divisors, whose sum is σ = 40394912. Its totient is φ = 40394910.

The previous prime is 40394899. The next prime is 40394933. The reversal of 40394911 is 11949304.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40394911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40394111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20197455 + 20197456.

It is an arithmetic number, because the mean of its divisors is an integer number (20197456).

Almost surely, 2^40394911 is an apocalyptic number.

40394911 is a deficient number, since it is larger than the sum of its proper divisors (1).

40394911 is an equidigital number, since it uses as much as digits as its factorization.

40394911 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 40394911 is about 6355.6990960869. The cubic root of 40394911 is about 343.1169861644.

The spelling of 40394911 in words is "forty million, three hundred ninety-four thousand, nine hundred eleven".