31426993 has 8 divisors (see below), whose sum is σ = 35316288. Its totient is φ = 27747984.

The previous prime is 31426987. The next prime is 31427003. The reversal of 31426993 is 39962413.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31426993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31426903) 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, 52255 + ... + 52852.

It is an arithmetic number, because the mean of its divisors is an integer number (4414536).

Almost surely, 2^31426993 is an apocalyptic number.

It is an amenable number.

31426993 is a deficient number, since it is larger than the sum of its proper divisors (3889295).

31426993 is a wasteful number, since it uses less digits than its factorization.

31426993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105143.

The product of its digits is 34992, while the sum is 37.

The square root of 31426993 is about 5605.9783267508. The cubic root of 31426993 is about 315.5738025378.

The spelling of 31426993 in words is "thirty-one million, four hundred twenty-six thousand, nine hundred ninety-three".