31099013 has 8 divisors (see below), whose sum is σ = 35401536. Its totient is φ = 27042400.

The previous prime is 31099009. The next prime is 31099027.

31099013 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 31099013 - 2² = 31099009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31099063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61208 + ... + 61713.

It is an arithmetic number, because the mean of its divisors is an integer number (4425192).

Almost surely, 2^31099013 is an apocalyptic number.

It is an amenable number.

31099013 is a deficient number, since it is larger than the sum of its proper divisors (4302523).

31099013 is a wasteful number, since it uses less digits than its factorization.

31099013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122955.

The product of its (nonzero) digits is 729, while the sum is 26.

The square root of 31099013 is about 5576.6489041359. The cubic root of 31099013 is about 314.4721587455.

The spelling of 31099013 in words is "thirty-one million, ninety-nine thousand, thirteen".