40031099 has 4 divisors (see below), whose sum is σ = 40060920. Its totient is φ = 40001280.

The previous prime is 40031071. The next prime is 40031113. The reversal of 40031099 is 99013004.

It is a happy number.

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 40031099 - 2²⁴ = 23253883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40031009) 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, 12797 + ... + 15614.

It is an arithmetic number, because the mean of its divisors is an integer number (10015230).

Almost surely, 2^40031099 is an apocalyptic number.

40031099 is a deficient number, since it is larger than the sum of its proper divisors (29821).

40031099 is a wasteful number, since it uses less digits than its factorization.

40031099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29820.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 40031099 is about 6327.0134344729. The cubic root of 40031099 is about 342.0837972791.

The spelling of 40031099 in words is "forty million, thirty-one thousand, ninety-nine".