31479493 has 8 divisors (see below), whose sum is σ = 31979808. Its totient is φ = 30982224.

The previous prime is 31479491. The next prime is 31479499. The reversal of 31479493 is 39497413.

It is a happy number.

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 31479493 - 2¹ = 31479491 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 (31479491) 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, 28255 + ... + 29347.

It is an arithmetic number, because the mean of its divisors is an integer number (3997476).

Almost surely, 2^31479493 is an apocalyptic number.

It is an amenable number.

31479493 is a deficient number, since it is larger than the sum of its proper divisors (500315).

31479493 is a wasteful number, since it uses less digits than its factorization.

31479493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1523.

The product of its digits is 81648, while the sum is 40.

The square root of 31479493 is about 5610.6588739648. The cubic root of 31479493 is about 315.7494308325.

The spelling of 31479493 in words is "thirty-one million, four hundred seventy-nine thousand, four hundred ninety-three".