31475849 has 2 divisors, whose sum is σ = 31475850. Its totient is φ = 31475848.

The previous prime is 31475827. The next prime is 31475909. The reversal of 31475849 is 94857413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29626249 + 1849600 = 5443^2 + 1360^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31475849 is a prime.

It is not a weakly prime, because it can be changed into another prime (31475749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15737924 + 15737925.

It is an arithmetic number, because the mean of its divisors is an integer number (15737925).

Almost surely, 2^31475849 is an apocalyptic number.

It is an amenable number.

31475849 is a deficient number, since it is larger than the sum of its proper divisors (1).

31475849 is an equidigital number, since it uses as much as digits as its factorization.

31475849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 41.

The square root of 31475849 is about 5610.3341255223. The cubic root of 31475849 is about 315.7372468654.

The spelling of 31475849 in words is "thirty-one million, four hundred seventy-five thousand, eight hundred forty-nine".