31969453 has 2 divisors, whose sum is σ = 31969454. Its totient is φ = 31969452.

The previous prime is 31969451. The next prime is 31969489. The reversal of 31969453 is 35496913.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24472809 + 7496644 = 4947^2 + 2738^2 .

It is a cyclic number.

It is not a de Polignac number, because 31969453 - 2¹ = 31969451 is a prime.

Together with 31969451, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31969451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15984726 + 15984727.

It is an arithmetic number, because the mean of its divisors is an integer number (15984727).

Almost surely, 2^31969453 is an apocalyptic number.

It is an amenable number.

31969453 is a deficient number, since it is larger than the sum of its proper divisors (1).

31969453 is an equidigital number, since it uses as much as digits as its factorization.

31969453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87480, while the sum is 40.

The square root of 31969453 is about 5654.1536059785. The cubic root of 31969453 is about 317.3791566902.

The spelling of 31969453 in words is "thirty-one million, nine hundred sixty-nine thousand, four hundred fifty-three".