31472489 has 2 divisors, whose sum is σ = 31472490. Its totient is φ = 31472488.

The previous prime is 31472479. The next prime is 31472501. The reversal of 31472489 is 98427413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26956864 + 4515625 = 5192^2 + 2125^2 .

It is a cyclic number.

It is not a de Polignac number, because 31472489 - 2¹⁶ = 31406953 is a prime.

It is not a weakly prime, because it can be changed into another prime (31472449) 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, 15736244 + 15736245.

It is an arithmetic number, because the mean of its divisors is an integer number (15736245).

Almost surely, 2^31472489 is an apocalyptic number.

It is an amenable number.

31472489 is a deficient number, since it is larger than the sum of its proper divisors (1).

31472489 is an equidigital number, since it uses as much as digits as its factorization.

31472489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 38.

The square root of 31472489 is about 5610.0346701246. The cubic root of 31472489 is about 315.7260116386.

The spelling of 31472489 in words is "thirty-one million, four hundred seventy-two thousand, four hundred eighty-nine".