191230032869 has 2 divisors, whose sum is σ = 191230032870. Its totient is φ = 191230032868.

The previous prime is 191230032853. The next prime is 191230032899. The reversal of 191230032869 is 968230032191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121037889025 + 70192143844 = 347905^2 + 264938^2 .

It is a cyclic number.

It is not a de Polignac number, because 191230032869 - 2⁴ = 191230032853 is a prime.

It is a super-2 number, since 2×191230032869² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191230032809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95615016434 + 95615016435.

It is an arithmetic number, because the mean of its divisors is an integer number (95615016435).

Almost surely, 2^191230032869 is an apocalyptic number.

It is an amenable number.

191230032869 is a deficient number, since it is larger than the sum of its proper divisors (1).

191230032869 is an equidigital number, since it uses as much as digits as its factorization.

191230032869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 44.

The spelling of 191230032869 in words is "one hundred ninety-one billion, two hundred thirty million, thirty-two thousand, eight hundred sixty-nine".