188713897 has 2 divisors, whose sum is σ = 188713898. Its totient is φ = 188713896.

The previous prime is 188713879. The next prime is 188713907. The reversal of 188713897 is 798317881.

Together with previous prime (188713879) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 154853136 + 33860761 = 12444^2 + 5819^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-188713897 is a prime.

It is a super-2 number, since 2×188713897² = 71225869841853218, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (188713807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94356948 + 94356949.

It is an arithmetic number, because the mean of its divisors is an integer number (94356949).

Almost surely, 2^188713897 is an apocalyptic number.

It is an amenable number.

188713897 is a deficient number, since it is larger than the sum of its proper divisors (1).

188713897 is an equidigital number, since it uses as much as digits as its factorization.

188713897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 677376, while the sum is 52.

The square root of 188713897 is about 13737.3176784990. The cubic root of 188713897 is about 573.5896343328.

The spelling of 188713897 in words is "one hundred eighty-eight million, seven hundred thirteen thousand, eight hundred ninety-seven".