31497673 has 2 divisors, whose sum is σ = 31497674. Its totient is φ = 31497672.

The previous prime is 31497671. The next prime is 31497679. The reversal of 31497673 is 37679413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29626249 + 1871424 = 5443^2 + 1368^2 .

It is a cyclic number.

It is not a de Polignac number, because 31497673 - 2¹ = 31497671 is a prime.

Together with 31497671, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (31497671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15748836 + 15748837.

It is an arithmetic number, because the mean of its divisors is an integer number (15748837).

Almost surely, 2^31497673 is an apocalyptic number.

It is an amenable number.

31497673 is a deficient number, since it is larger than the sum of its proper divisors (1).

31497673 is an equidigital number, since it uses as much as digits as its factorization.

31497673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 95256, while the sum is 40.

The square root of 31497673 is about 5612.2787706956. The cubic root of 31497673 is about 315.8102028824.

The spelling of 31497673 in words is "thirty-one million, four hundred ninety-seven thousand, six hundred seventy-three".