40100839 has 2 divisors, whose sum is σ = 40100840. Its totient is φ = 40100838.

The previous prime is 40100831. The next prime is 40100861. The reversal of 40100839 is 93800104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40100839 - 2³ = 40100831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40100831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20050419 + 20050420.

It is an arithmetic number, because the mean of its divisors is an integer number (20050420).

Almost surely, 2^40100839 is an apocalyptic number.

40100839 is a deficient number, since it is larger than the sum of its proper divisors (1).

40100839 is an equidigital number, since it uses as much as digits as its factorization.

40100839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 40100839 is about 6332.5223252666. The cubic root of 40100839 is about 342.2823352819.

The spelling of 40100839 in words is "forty million, one hundred thousand, eight hundred thirty-nine".