39991426171 has 2 divisors, whose sum is σ = 39991426172. Its totient is φ = 39991426170.

The previous prime is 39991426099. The next prime is 39991426193. The reversal of 39991426171 is 17162419993.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 39991426171 - 2³³ = 31401491579 is a prime.

It is not a weakly prime, because it can be changed into another prime (39991420171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19995713085 + 19995713086.

It is an arithmetic number, because the mean of its divisors is an integer number (19995713086).

Almost surely, 2^39991426171 is an apocalyptic number.

39991426171 is a deficient number, since it is larger than the sum of its proper divisors (1).

39991426171 is an equidigital number, since it uses as much as digits as its factorization.

39991426171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 734832, while the sum is 52.

The spelling of 39991426171 in words is "thirty-nine billion, nine hundred ninety-one million, four hundred twenty-six thousand, one hundred seventy-one".