31264172089 has 2 divisors, whose sum is σ = 31264172090. Its totient is φ = 31264172088.

The previous prime is 31264172083. The next prime is 31264172189. The reversal of 31264172089 is 98027146213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31155074064 + 109098025 = 176508^2 + 10445^2 .

It is an emirp because it is prime and its reverse (98027146213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31264172089 - 2⁹ = 31264171577 is a prime.

It is not a weakly prime, because it can be changed into another prime (31264172083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15632086044 + 15632086045.

It is an arithmetic number, because the mean of its divisors is an integer number (15632086045).

Almost surely, 2^31264172089 is an apocalyptic number.

It is an amenable number.

31264172089 is a deficient number, since it is larger than the sum of its proper divisors (1).

31264172089 is an equidigital number, since it uses as much as digits as its factorization.

31264172089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 43.

The spelling of 31264172089 in words is "thirty-one billion, two hundred sixty-four million, one hundred seventy-two thousand, eighty-nine".