31407065149 has 2 divisors, whose sum is σ = 31407065150. Its totient is φ = 31407065148.

The previous prime is 31407065033. The next prime is 31407065153. The reversal of 31407065149 is 94156070413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15764560249 + 15642504900 = 125557^2 + 125070^2 .

It is a cyclic number.

It is not a de Polignac number, because 31407065149 - 2¹⁷ = 31406934077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31408065149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15703532574 + 15703532575.

It is an arithmetic number, because the mean of its divisors is an integer number (15703532575).

Almost surely, 2^31407065149 is an apocalyptic number.

It is an amenable number.

31407065149 is a deficient number, since it is larger than the sum of its proper divisors (1).

31407065149 is an equidigital number, since it uses as much as digits as its factorization.

31407065149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 40.

The spelling of 31407065149 in words is "thirty-one billion, four hundred seven million, sixty-five thousand, one hundred forty-nine".