40985783 has 2 divisors, whose sum is σ = 40985784. Its totient is φ = 40985782.

The previous prime is 40985767. The next prime is 40985803. The reversal of 40985783 is 38758904.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40985783 - 2⁴ = 40985767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40985713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20492891 + 20492892.

It is an arithmetic number, because the mean of its divisors is an integer number (20492892).

Almost surely, 2^40985783 is an apocalyptic number.

40985783 is a deficient number, since it is larger than the sum of its proper divisors (1).

40985783 is an equidigital number, since it uses as much as digits as its factorization.

40985783 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 40985783 is about 6402.0139799910. The cubic root of 40985783 is about 344.7818630854.

The spelling of 40985783 in words is "forty million, nine hundred eighty-five thousand, seven hundred eighty-three".