31420109 has 8 divisors (see below), whose sum is σ = 35944320. Its totient is φ = 26904816.

The previous prime is 31420099. The next prime is 31420133. The reversal of 31420109 is 90102413.

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 31420109 - 2¹² = 31416013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31420189) 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, 9347 + ... + 12255.

It is an arithmetic number, because the mean of its divisors is an integer number (4493040).

Almost surely, 2^31420109 is an apocalyptic number.

It is an amenable number.

31420109 is a deficient number, since it is larger than the sum of its proper divisors (4524211).

31420109 is a wasteful number, since it uses less digits than its factorization.

31420109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4459.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 31420109 is about 5605.3643057343. The cubic root of 31420109 is about 315.5507589852.

The spelling of 31420109 in words is "thirty-one million, four hundred twenty thousand, one hundred nine".