31403109 has 8 divisors (see below), whose sum is σ = 42262560. Its totient is φ = 20739536.

The previous prime is 31403077. The next prime is 31403117. The reversal of 31403109 is 90130413.

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 31403109 - 2⁵ = 31403077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31403129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48594 + ... + 49235.

It is an arithmetic number, because the mean of its divisors is an integer number (5282820).

Almost surely, 2^31403109 is an apocalyptic number.

It is an amenable number.

31403109 is a deficient number, since it is larger than the sum of its proper divisors (10859451).

31403109 is a wasteful number, since it uses less digits than its factorization.

31403109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97939.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 31403109 is about 5603.8476960032. The cubic root of 31403109 is about 315.4938386367.

The spelling of 31403109 in words is "thirty-one million, four hundred three thousand, one hundred nine".