31348637 has 2 divisors, whose sum is σ = 31348638. Its totient is φ = 31348636.

The previous prime is 31348633. The next prime is 31348643. The reversal of 31348637 is 73684313.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29441476 + 1907161 = 5426^2 + 1381^2 .

It is a cyclic number.

It is not a de Polignac number, because 31348637 - 2² = 31348633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31348597 and 31348606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31348631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15674318 + 15674319.

It is an arithmetic number, because the mean of its divisors is an integer number (15674319).

Almost surely, 2^31348637 is an apocalyptic number.

It is an amenable number.

31348637 is a deficient number, since it is larger than the sum of its proper divisors (1).

31348637 is an equidigital number, since it uses as much as digits as its factorization.

31348637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 35.

The square root of 31348637 is about 5598.9853545084. The cubic root of 31348637 is about 315.3113139627.

The spelling of 31348637 in words is "thirty-one million, three hundred forty-eight thousand, six hundred thirty-seven".