40099783 has 2 divisors, whose sum is σ = 40099784. Its totient is φ = 40099782.

The previous prime is 40099781. The next prime is 40099799. The reversal of 40099783 is 38799004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40099783 - 2¹ = 40099781 is a prime.

Together with 40099781, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40099781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20049891 + 20049892.

It is an arithmetic number, because the mean of its divisors is an integer number (20049892).

Almost surely, 2^40099783 is an apocalyptic number.

40099783 is a deficient number, since it is larger than the sum of its proper divisors (1).

40099783 is an equidigital number, since it uses as much as digits as its factorization.

40099783 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 40099783 is about 6332.4389456196. The cubic root of 40099783 is about 342.2793307453.

The spelling of 40099783 in words is "forty million, ninety-nine thousand, seven hundred eighty-three".