40099187 has 2 divisors, whose sum is σ = 40099188. Its totient is φ = 40099186.

The previous prime is 40099159. The next prime is 40099193. The reversal of 40099187 is 78199004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40099187 - 2⁶ = 40099123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40099187.

It is not a weakly prime, because it can be changed into another prime (40099117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20049593 + 20049594.

It is an arithmetic number, because the mean of its divisors is an integer number (20049594).

Almost surely, 2^40099187 is an apocalyptic number.

40099187 is a deficient number, since it is larger than the sum of its proper divisors (1).

40099187 is an equidigital number, since it uses as much as digits as its factorization.

40099187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 40099187 is about 6332.3918861675. The cubic root of 40099187 is about 342.2776349797.

The spelling of 40099187 in words is "forty million, ninety-nine thousand, one hundred eighty-seven".