189806693903 has 2 divisors, whose sum is σ = 189806693904. Its totient is φ = 189806693902.

The previous prime is 189806693893. The next prime is 189806694043. The reversal of 189806693903 is 309396608981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 189806693903 - 2²⁰ = 189805645327 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189806693303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94903346951 + 94903346952.

It is an arithmetic number, because the mean of its divisors is an integer number (94903346952).

Almost surely, 2^189806693903 is an apocalyptic number.

189806693903 is a deficient number, since it is larger than the sum of its proper divisors (1).

189806693903 is an equidigital number, since it uses as much as digits as its factorization.

189806693903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15116544, while the sum is 62.

The spelling of 189806693903 in words is "one hundred eighty-nine billion, eight hundred six million, six hundred ninety-three thousand, nine hundred three".