181275697 has 2 divisors, whose sum is σ = 181275698. Its totient is φ = 181275696.

The previous prime is 181275683. The next prime is 181275701. The reversal of 181275697 is 796572181.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133610481 + 47665216 = 11559^2 + 6904^2 .

It is a cyclic number.

It is not a de Polignac number, because 181275697 - 2²³ = 172887089 is a prime.

It is not a weakly prime, because it can be changed into another prime (181272697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90637848 + 90637849.

It is an arithmetic number, because the mean of its divisors is an integer number (90637849).

Almost surely, 2^181275697 is an apocalyptic number.

It is an amenable number.

181275697 is a deficient number, since it is larger than the sum of its proper divisors (1).

181275697 is an equidigital number, since it uses as much as digits as its factorization.

181275697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 211680, while the sum is 46.

The square root of 181275697 is about 13463.8663466331. The cubic root of 181275697 is about 565.9523417109.

The spelling of 181275697 in words is "one hundred eighty-one million, two hundred seventy-five thousand, six hundred ninety-seven".