31298397 has 8 divisors (see below), whose sum is σ = 44941344. Its totient is φ = 19260528.

The previous prime is 31298357. The next prime is 31298413. The reversal of 31298397 is 79389213.

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

It is not a de Polignac number, because 31298397 - 2⁷ = 31298269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31298317) 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, 401223 + ... + 401300.

It is an arithmetic number, because the mean of its divisors is an integer number (5617668).

Almost surely, 2^31298397 is an apocalyptic number.

It is an amenable number.

31298397 is a deficient number, since it is larger than the sum of its proper divisors (13642947).

31298397 is a wasteful number, since it uses less digits than its factorization.

31298397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802539.

The product of its digits is 81648, while the sum is 42.

The square root of 31298397 is about 5594.4970283306. The cubic root of 31298397 is about 315.1427823350.

The spelling of 31298397 in words is "thirty-one million, two hundred ninety-eight thousand, three hundred ninety-seven".