31470493 has 8 divisors (see below), whose sum is σ = 32450040. Its totient is φ = 30501120.

The previous prime is 31470469. The next prime is 31470547. The reversal of 31470493 is 39407413.

It can be written as a sum of positive squares in 4 ways, for example, as 356409 + 31114084 = 597^2 + 5578^2 .

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-31470493 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 (31470443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3993 + ... + 8881.

It is an arithmetic number, because the mean of its divisors is an integer number (4056255).

Almost surely, 2^31470493 is an apocalyptic number.

It is an amenable number.

31470493 is a deficient number, since it is larger than the sum of its proper divisors (979547).

31470493 is a wasteful number, since it uses less digits than its factorization.

31470493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5087.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 31470493 is about 5609.8567717902. The cubic root of 31470493 is about 315.7193370003.

It can be divided in two parts, 314 and 70493, that added together give a palindrome (70807).

The spelling of 31470493 in words is "thirty-one million, four hundred seventy thousand, four hundred ninety-three".