31272869 has 2 divisors, whose sum is σ = 31272870. Its totient is φ = 31272868.

The previous prime is 31272833. The next prime is 31272887. The reversal of 31272869 is 96827213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26388769 + 4884100 = 5137^2 + 2210^2 .

It is a cyclic number.

It is not a de Polignac number, because 31272869 - 2¹⁶ = 31207333 is a prime.

It is a super-2 number, since 2×31272869² = 1955984670982322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31272889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15636434 + 15636435.

It is an arithmetic number, because the mean of its divisors is an integer number (15636435).

Almost surely, 2^31272869 is an apocalyptic number.

It is an amenable number.

31272869 is a deficient number, since it is larger than the sum of its proper divisors (1).

31272869 is an equidigital number, since it uses as much as digits as its factorization.

31272869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 38.

The square root of 31272869 is about 5592.2150352074. The cubic root of 31272869 is about 315.0570787638.

The spelling of 31272869 in words is "thirty-one million, two hundred seventy-two thousand, eight hundred sixty-nine".