40354939 has 2 divisors, whose sum is σ = 40354940. Its totient is φ = 40354938.

The previous prime is 40354933. The next prime is 40354967. The reversal of 40354939 is 93945304.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40354939 - 2⁵ = 40354907 is a prime.

It is a super-2 number, since 2×40354939² = 3257042203387442, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40354898 and 40354907.

It is not a weakly prime, because it can be changed into another prime (40354933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20177469 + 20177470.

It is an arithmetic number, because the mean of its divisors is an integer number (20177470).

Almost surely, 2^40354939 is an apocalyptic number.

40354939 is a deficient number, since it is larger than the sum of its proper divisors (1).

40354939 is an equidigital number, since it uses as much as digits as its factorization.

40354939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320, while the sum is 37.

The square root of 40354939 is about 6352.5537384583. The cubic root of 40354939 is about 343.0037738962.

The spelling of 40354939 in words is "forty million, three hundred fifty-four thousand, nine hundred thirty-nine".