180199023397 has 2 divisors, whose sum is σ = 180199023398. Its totient is φ = 180199023396.

The previous prime is 180199023379. The next prime is 180199023437. The reversal of 180199023397 is 793320991081.

Together with previous prime (180199023379) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137808743076 + 42390280321 = 371226^2 + 205889^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-180199023397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (180199023317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90099511698 + 90099511699.

It is an arithmetic number, because the mean of its divisors is an integer number (90099511699).

Almost surely, 2^180199023397 is an apocalyptic number.

It is an amenable number.

180199023397 is a deficient number, since it is larger than the sum of its proper divisors (1).

180199023397 is an equidigital number, since it uses as much as digits as its factorization.

180199023397 is an evil number, because the sum of its binary digits is even.

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

The spelling of 180199023397 in words is "one hundred eighty billion, one hundred ninety-nine million, twenty-three thousand, three hundred ninety-seven".