31123332949 has 2 divisors, whose sum is σ = 31123332950. Its totient is φ = 31123332948.

The previous prime is 31123332899. The next prime is 31123333001. The reversal of 31123332949 is 94923332113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24143565924 + 6979767025 = 155382^2 + 83545^2 .

It is a cyclic number.

It is not a de Polignac number, because 31123332949 - 2¹⁵ = 31123300181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31123332049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15561666474 + 15561666475.

It is an arithmetic number, because the mean of its divisors is an integer number (15561666475).

Almost surely, 2^31123332949 is an apocalyptic number.

It is an amenable number.

31123332949 is a deficient number, since it is larger than the sum of its proper divisors (1).

31123332949 is an equidigital number, since it uses as much as digits as its factorization.

31123332949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 40.

The spelling of 31123332949 in words is "thirty-one billion, one hundred twenty-three million, three hundred thirty-two thousand, nine hundred forty-nine".