40409983 has 2 divisors, whose sum is σ = 40409984. Its totient is φ = 40409982.

The previous prime is 40409959. The next prime is 40410023. The reversal of 40409983 is 38990404.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40409983 - 2¹³ = 40401791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40409683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20204991 + 20204992.

It is an arithmetic number, because the mean of its divisors is an integer number (20204992).

Almost surely, 2^40409983 is an apocalyptic number.

40409983 is a deficient number, since it is larger than the sum of its proper divisors (1).

40409983 is an equidigital number, since it uses as much as digits as its factorization.

40409983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 40409983 is about 6356.8846929923. The cubic root of 40409983 is about 343.1596550388.

The spelling of 40409983 in words is "forty million, four hundred nine thousand, nine hundred eighty-three".