40089899 has 4 divisors (see below), whose sum is σ = 40382664. Its totient is φ = 39797136.

The previous prime is 40089887. The next prime is 40089911. The reversal of 40089899 is 99898004.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (40089887) and next prime (40089911).

It is a cyclic number.

It is not a de Polignac number, because 40089899 - 2⁴ = 40089883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40089839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146177 + ... + 146450.

It is an arithmetic number, because the mean of its divisors is an integer number (10095666).

Almost surely, 2^40089899 is an apocalyptic number.

40089899 is a deficient number, since it is larger than the sum of its proper divisors (292765).

40089899 is a wasteful number, since it uses less digits than its factorization.

40089899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292764.

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 40089899 is about 6331.6584715223. The cubic root of 40089899 is about 342.2512061799.

The spelling of 40089899 in words is "forty million, eighty-nine thousand, eight hundred ninety-nine".