31454893 has 4 divisors (see below), whose sum is σ = 31743580. Its totient is φ = 31166208.

The previous prime is 31454881. The next prime is 31454903. The reversal of 31454893 is 39845413.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16104169 + 15350724 = 4013^2 + 3918^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31454893 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 (31454873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144180 + ... + 144397.

It is an arithmetic number, because the mean of its divisors is an integer number (7935895).

Almost surely, 2^31454893 is an apocalyptic number.

It is an amenable number.

31454893 is a deficient number, since it is larger than the sum of its proper divisors (288687).

31454893 is a wasteful number, since it uses less digits than its factorization.

31454893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288686.

The product of its digits is 51840, while the sum is 37.

The square root of 31454893 is about 5608.4661896101. The cubic root of 31454893 is about 315.6671607634.

The spelling of 31454893 in words is "thirty-one million, four hundred fifty-four thousand, eight hundred ninety-three".