40099859 has 2 divisors, whose sum is σ = 40099860. Its totient is φ = 40099858.

The previous prime is 40099831. The next prime is 40099867. The reversal of 40099859 is 95899004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40099859 - 2¹² = 40095763 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40099819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20049929 + 20049930.

It is an arithmetic number, because the mean of its divisors is an integer number (20049930).

Almost surely, 2^40099859 is an apocalyptic number.

40099859 is a deficient number, since it is larger than the sum of its proper divisors (1).

40099859 is an equidigital number, since it uses as much as digits as its factorization.

40099859 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 40099859 is about 6332.4449464642. Note that the first 3 decimals coincide. The cubic root of 40099859 is about 342.2795469826.

The spelling of 40099859 in words is "forty million, ninety-nine thousand, eight hundred fifty-nine".