31001109949 has 2 divisors, whose sum is σ = 31001109950. Its totient is φ = 31001109948.

The previous prime is 31001109941. The next prime is 31001109989. The reversal of 31001109949 is 94990110013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23840904025 + 7160205924 = 154405^2 + 84618^2 .

It is a cyclic number.

It is not a de Polignac number, because 31001109949 - 2³ = 31001109941 is a prime.

It is a super-2 number, since 2×31001109949² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31001109941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15500554974 + 15500554975.

It is an arithmetic number, because the mean of its divisors is an integer number (15500554975).

Almost surely, 2^31001109949 is an apocalyptic number.

It is an amenable number.

31001109949 is a deficient number, since it is larger than the sum of its proper divisors (1).

31001109949 is an equidigital number, since it uses as much as digits as its factorization.

31001109949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8748, while the sum is 37.

The spelling of 31001109949 in words is "thirty-one billion, one million, one hundred nine thousand, nine hundred forty-nine".