31124477 has 2 divisors, whose sum is σ = 31124478. Its totient is φ = 31124476.

The previous prime is 31124459. The next prime is 31124479. The reversal of 31124477 is 77442113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24462916 + 6661561 = 4946^2 + 2581^2 .

It is a cyclic number.

It is not a de Polignac number, because 31124477 - 2¹⁴ = 31108093 is a prime.

Together with 31124479, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31124479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15562238 + 15562239.

It is an arithmetic number, because the mean of its divisors is an integer number (15562239).

Almost surely, 2^31124477 is an apocalyptic number.

It is an amenable number.

31124477 is a deficient number, since it is larger than the sum of its proper divisors (1).

31124477 is an equidigital number, since it uses as much as digits as its factorization.

31124477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4704, while the sum is 29.

The square root of 31124477 is about 5578.9315285277. The cubic root of 31124477 is about 314.5579656966.

The spelling of 31124477 in words is "thirty-one million, one hundred twenty-four thousand, four hundred seventy-seven".