31124123 has 2 divisors, whose sum is σ = 31124124. Its totient is φ = 31124122.

The previous prime is 31124089. The next prime is 31124143. The reversal of 31124123 is 32142113.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31124123 - 2¹² = 31120027 is a prime.

It is a super-2 number, since 2×31124123² = 1937422065038258, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (31124143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15562061 + 15562062.

It is an arithmetic number, because the mean of its divisors is an integer number (15562062).

Almost surely, 2^31124123 is an apocalyptic number.

31124123 is a deficient number, since it is larger than the sum of its proper divisors (1).

31124123 is an equidigital number, since it uses as much as digits as its factorization.

31124123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144, while the sum is 17.

The square root of 31124123 is about 5578.8998019323. The cubic root of 31124123 is about 314.5567731310.

Adding to 31124123 its reverse (32142113), we get a palindrome (63266236).

The spelling of 31124123 in words is "thirty-one million, one hundred twenty-four thousand, one hundred twenty-three".