31399099 has 8 divisors (see below), whose sum is σ = 31774208. Its totient is φ = 31026240.

The previous prime is 31399097. The next prime is 31399129. The reversal of 31399099 is 99099313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31399099 - 2¹ = 31399097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31399097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57769 + ... + 58309.

It is an arithmetic number, because the mean of its divisors is an integer number (3971776).

Almost surely, 2^31399099 is an apocalyptic number.

31399099 is a deficient number, since it is larger than the sum of its proper divisors (375109).

31399099 is a wasteful number, since it uses less digits than its factorization.

31399099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1125.

The product of its (nonzero) digits is 59049, while the sum is 43.

The square root of 31399099 is about 5603.4898946996. The cubic root of 31399099 is about 315.4804091368.

The spelling of 31399099 in words is "thirty-one million, three hundred ninety-nine thousand, ninety-nine".