31484905 has 8 divisors (see below), whose sum is σ = 37816200. Its totient is φ = 25165056.

The previous prime is 31484903. The next prime is 31484911. The reversal of 31484905 is 50948413.

It can be written as a sum of positive squares in 4 ways, for example, as 8088336 + 23396569 = 2844^2 + 4837^2 .

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 31484905 - 2¹ = 31484903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31484903) 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, 5331 + ... + 9559.

It is an arithmetic number, because the mean of its divisors is an integer number (4727025).

Almost surely, 2^31484905 is an apocalyptic number.

It is an amenable number.

31484905 is a deficient number, since it is larger than the sum of its proper divisors (6331295).

31484905 is a wasteful number, since it uses less digits than its factorization.

31484905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5723.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 31484905 is about 5611.1411495346. The cubic root of 31484905 is about 315.7675244954.

The spelling of 31484905 in words is "thirty-one million, four hundred eighty-four thousand, nine hundred five".