31493087 has 8 divisors (see below), whose sum is σ = 32046000. Its totient is φ = 30945024.

The previous prime is 31493083. The next prime is 31493131. The reversal of 31493087 is 78039413.

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 31493087 - 2² = 31493083 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 (31493083) 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, 13364 + ... + 15542.

It is an arithmetic number, because the mean of its divisors is an integer number (4005750).

Almost surely, 2^31493087 is an apocalyptic number.

31493087 is a deficient number, since it is larger than the sum of its proper divisors (552913).

31493087 is a wasteful number, since it uses less digits than its factorization.

31493087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2425.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 31493087 is about 5611.8701873796. The cubic root of 31493087 is about 315.7948750212.

The spelling of 31493087 in words is "thirty-one million, four hundred ninety-three thousand, eighty-seven".