40047983 has 2 divisors, whose sum is σ = 40047984. Its totient is φ = 40047982.

The previous prime is 40047979. The next prime is 40047989. The reversal of 40047983 is 38974004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40047983 - 2² = 40047979 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40047989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20023991 + 20023992.

It is an arithmetic number, because the mean of its divisors is an integer number (20023992).

Almost surely, 2^40047983 is an apocalyptic number.

40047983 is a deficient number, since it is larger than the sum of its proper divisors (1).

40047983 is an equidigital number, since it uses as much as digits as its factorization.

40047983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 40047983 is about 6328.3475726291. The cubic root of 40047983 is about 342.1318843177.

The spelling of 40047983 in words is "forty million, forty-seven thousand, nine hundred eighty-three".