31432969 has 2 divisors, whose sum is σ = 31432970. Its totient is φ = 31432968.

The previous prime is 31432967. The next prime is 31432991. The reversal of 31432969 is 96923413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21977344 + 9455625 = 4688^2 + 3075^2 .

It is a cyclic number.

It is not a de Polignac number, because 31432969 - 2¹ = 31432967 is a prime.

It is a super-2 number, since 2×31432969² = 1976063080309922, which contains 22 as substring.

Together with 31432967, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (31432967) 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, 15716484 + 15716485.

It is an arithmetic number, because the mean of its divisors is an integer number (15716485).

Almost surely, 2^31432969 is an apocalyptic number.

It is an amenable number.

31432969 is a deficient number, since it is larger than the sum of its proper divisors (1).

31432969 is an equidigital number, since it uses as much as digits as its factorization.

31432969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 37.

The square root of 31432969 is about 5606.5113038324. The cubic root of 31432969 is about 315.5938039160.

The spelling of 31432969 in words is "thirty-one million, four hundred thirty-two thousand, nine hundred sixty-nine".