40170899 has 4 divisors (see below), whose sum is σ = 40327464. Its totient is φ = 40014336.

The previous prime is 40170869. The next prime is 40170919. The reversal of 40170899 is 99807104.

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

It is a cyclic number.

It is not a de Polignac number, because 40170899 - 2¹² = 40166803 is a prime.

It is a super-2 number, since 2×40170899² = 3227402252936402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40170869) 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, 77897 + ... + 78410.

It is an arithmetic number, because the mean of its divisors is an integer number (10081866).

Almost surely, 2^40170899 is an apocalyptic number.

40170899 is a deficient number, since it is larger than the sum of its proper divisors (156565).

40170899 is a wasteful number, since it uses less digits than its factorization.

40170899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156564.

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

The square root of 40170899 is about 6338.0516722412. The cubic root of 40170899 is about 342.4815526321.

The spelling of 40170899 in words is "forty million, one hundred seventy thousand, eight hundred ninety-nine".