31075497949 has 2 divisors, whose sum is σ = 31075497950. Its totient is φ = 31075497948.

The previous prime is 31075497941. The next prime is 31075497967. The reversal of 31075497949 is 94979457013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23117073849 + 7958424100 = 152043^2 + 89210^2 .

It is a cyclic number.

It is not a de Polignac number, because 31075497949 - 2³ = 31075497941 is a prime.

It is a super-3 number, since 3×31075497949³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31075497893 and 31075497902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31075497941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15537748974 + 15537748975.

It is an arithmetic number, because the mean of its divisors is an integer number (15537748975).

Almost surely, 2^31075497949 is an apocalyptic number.

It is an amenable number.

31075497949 is a deficient number, since it is larger than the sum of its proper divisors (1).

31075497949 is an equidigital number, since it uses as much as digits as its factorization.

31075497949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8573040, while the sum is 58.

The spelling of 31075497949 in words is "thirty-one billion, seventy-five million, four hundred ninety-seven thousand, nine hundred forty-nine".