40183939 has 2 divisors, whose sum is σ = 40183940. Its totient is φ = 40183938.

The previous prime is 40183909. The next prime is 40183981. The reversal of 40183939 is 93938104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40183939 - 2¹⁵ = 40151171 is a prime.

It is a super-2 number, since 2×40183939² = 3229497907111442, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40183898 and 40183907.

It is not a weakly prime, because it can be changed into another prime (40183909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20091969 + 20091970.

It is an arithmetic number, because the mean of its divisors is an integer number (20091970).

Almost surely, 2^40183939 is an apocalyptic number.

40183939 is a deficient number, since it is larger than the sum of its proper divisors (1).

40183939 is an equidigital number, since it uses as much as digits as its factorization.

40183939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 40183939 is about 6339.0802960682. The cubic root of 40183939 is about 342.5186066223.

The spelling of 40183939 in words is "forty million, one hundred eighty-three thousand, nine hundred thirty-nine".