31409461 has 2 divisors, whose sum is σ = 31409462. Its totient is φ = 31409460.

The previous prime is 31409459. The next prime is 31409503. The reversal of 31409461 is 16490413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21762225 + 9647236 = 4665^2 + 3106^2 .

It is an emirp because it is prime and its reverse (16490413) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31409461 - 2¹ = 31409459 is a prime.

Together with 31409459, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31409401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15704730 + 15704731.

It is an arithmetic number, because the mean of its divisors is an integer number (15704731).

Almost surely, 2^31409461 is an apocalyptic number.

It is an amenable number.

31409461 is a deficient number, since it is larger than the sum of its proper divisors (1).

31409461 is an equidigital number, since it uses as much as digits as its factorization.

31409461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 31409461 is about 5604.4144207937. The cubic root of 31409461 is about 315.5151091608.

Adding to 31409461 its reverse (16490413), we get a palindrome (47899874).

The spelling of 31409461 in words is "thirty-one million, four hundred nine thousand, four hundred sixty-one".