40403983 has 4 divisors (see below), whose sum is σ = 41389488. Its totient is φ = 39418480.

The previous prime is 40403981. The next prime is 40403999. The reversal of 40403983 is 38930404.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40403983 - 2¹ = 40403981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40403981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 492691 + ... + 492772.

It is an arithmetic number, because the mean of its divisors is an integer number (10347372).

Almost surely, 2^40403983 is an apocalyptic number.

40403983 is a deficient number, since it is larger than the sum of its proper divisors (985505).

40403983 is an equidigital number, since it uses as much as digits as its factorization.

40403983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 985504.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 40403983 is about 6356.4127461958. The cubic root of 40403983 is about 343.1426702933.

The spelling of 40403983 in words is "forty million, four hundred three thousand, nine hundred eighty-three".