31267961 has 2 divisors, whose sum is σ = 31267962. Its totient is φ = 31267960.

The previous prime is 31267927. The next prime is 31267967. The reversal of 31267961 is 16976213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22857961 + 8410000 = 4781^2 + 2900^2 .

It is an emirp because it is prime and its reverse (16976213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31267961 - 2⁶ = 31267897 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (31267967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15633980 + 15633981.

It is an arithmetic number, because the mean of its divisors is an integer number (15633981).

Almost surely, 2^31267961 is an apocalyptic number.

It is an amenable number.

31267961 is a deficient number, since it is larger than the sum of its proper divisors (1).

31267961 is an equidigital number, since it uses as much as digits as its factorization.

31267961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 35.

The square root of 31267961 is about 5591.7761936615. The cubic root of 31267961 is about 315.0405960948.

The spelling of 31267961 in words is "thirty-one million, two hundred sixty-seven thousand, nine hundred sixty-one".