31463489 has 2 divisors, whose sum is σ = 31463490. Its totient is φ = 31463488.

The previous prime is 31463483. The next prime is 31463507. The reversal of 31463489 is 98436413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23668225 + 7795264 = 4865^2 + 2792^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31463489 is a prime.

It is a super-2 number, since 2×31463489² = 1979902280106242, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31463483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15731744 + 15731745.

It is an arithmetic number, because the mean of its divisors is an integer number (15731745).

Almost surely, 2^31463489 is an apocalyptic number.

It is an amenable number.

31463489 is a deficient number, since it is larger than the sum of its proper divisors (1).

31463489 is an equidigital number, since it uses as much as digits as its factorization.

31463489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 38.

The square root of 31463489 is about 5609.2324786908. The cubic root of 31463489 is about 315.6959133412.

The spelling of 31463489 in words is "thirty-one million, four hundred sixty-three thousand, four hundred eighty-nine".