31106397 has 8 divisors (see below), whose sum is σ = 47400256. Its totient is φ = 17775072.

The previous prime is 31106377. The next prime is 31106399. The reversal of 31106397 is 79360113.

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

It is not a de Polignac number, because 31106397 - 2⁶ = 31106333 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 (31106399) 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, 740608 + ... + 740649.

It is an arithmetic number, because the mean of its divisors is an integer number (5925032).

Almost surely, 2^31106397 is an apocalyptic number.

It is an amenable number.

31106397 is a deficient number, since it is larger than the sum of its proper divisors (16293859).

31106397 is a wasteful number, since it uses less digits than its factorization.

31106397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1481267.

The product of its (nonzero) digits is 3402, while the sum is 30.

The square root of 31106397 is about 5577.3109111829. The cubic root of 31106397 is about 314.4970456947.

The spelling of 31106397 in words is "thirty-one million, one hundred six thousand, three hundred ninety-seven".