31926849971 has 2 divisors, whose sum is σ = 31926849972. Its totient is φ = 31926849970.

The previous prime is 31926849947. The next prime is 31926849979. The reversal of 31926849971 is 17994862913.

It is a strong prime.

It is an emirp because it is prime and its reverse (17994862913) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31926849971 - 2¹⁸ = 31926587827 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31926849971.

It is not a weakly prime, because it can be changed into another prime (31926849979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15963424985 + 15963424986.

It is an arithmetic number, because the mean of its divisors is an integer number (15963424986).

Almost surely, 2^31926849971 is an apocalyptic number.

31926849971 is a deficient number, since it is larger than the sum of its proper divisors (1).

31926849971 is an equidigital number, since it uses as much as digits as its factorization.

31926849971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5878656, while the sum is 59.

The spelling of 31926849971 in words is "thirty-one billion, nine hundred twenty-six million, eight hundred forty-nine thousand, nine hundred seventy-one".