187969070917 has 2 divisors, whose sum is σ = 187969070918. Its totient is φ = 187969070916.

The previous prime is 187969070903. The next prime is 187969070921. The reversal of 187969070917 is 719070969781.

It is a Cunningham number, because it is equal to 433554²+1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 187969070916 + 1 = 433554^2 + 1^2 .

It is an emirp because it is prime and its reverse (719070969781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 187969070917 - 2¹¹ = 187969068869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (187969080917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93984535458 + 93984535459.

It is an arithmetic number, because the mean of its divisors is an integer number (93984535459).

Almost surely, 2^187969070917 is an apocalyptic number.

It is an amenable number.

187969070917 is a deficient number, since it is larger than the sum of its proper divisors (1).

187969070917 is an equidigital number, since it uses as much as digits as its factorization.

187969070917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12002256, while the sum is 64.

The spelling of 187969070917 in words is "one hundred eighty-seven billion, nine hundred sixty-nine million, seventy thousand, nine hundred seventeen".