31124369 has 2 divisors, whose sum is σ = 31124370. Its totient is φ = 31124368.

The previous prime is 31124351. The next prime is 31124377. The reversal of 31124369 is 96342113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28217344 + 2907025 = 5312^2 + 1705^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31124369 is a prime.

It is a super-2 number, since 2×31124369² = 1937452691296322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31124069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15562184 + 15562185.

It is an arithmetic number, because the mean of its divisors is an integer number (15562185).

Almost surely, 2^31124369 is an apocalyptic number.

It is an amenable number.

31124369 is a deficient number, since it is larger than the sum of its proper divisors (1).

31124369 is an equidigital number, since it uses as much as digits as its factorization.

31124369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 29.

The square root of 31124369 is about 5578.9218492465. The cubic root of 31124369 is about 314.5576018640.

The spelling of 31124369 in words is "thirty-one million, one hundred twenty-four thousand, three hundred sixty-nine".