31472437 has 2 divisors, whose sum is σ = 31472438. Its totient is φ = 31472436.

The previous prime is 31472359. The next prime is 31472449. The reversal of 31472437 is 73427413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27941796 + 3530641 = 5286^2 + 1879^2 .

It is an emirp because it is prime and its reverse (73427413) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31472437 - 2¹⁹ = 30948149 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 31472399 and 31472408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31472537) 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, 15736218 + 15736219.

It is an arithmetic number, because the mean of its divisors is an integer number (15736219).

Almost surely, 2^31472437 is an apocalyptic number.

It is an amenable number.

31472437 is a deficient number, since it is larger than the sum of its proper divisors (1).

31472437 is an equidigital number, since it uses as much as digits as its factorization.

31472437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14112, while the sum is 31.

The square root of 31472437 is about 5610.0300355702. The cubic root of 31472437 is about 315.7258377539.

The spelling of 31472437 in words is "thirty-one million, four hundred seventy-two thousand, four hundred thirty-seven".