189237689423 has 2 divisors, whose sum is σ = 189237689424. Its totient is φ = 189237689422.

The previous prime is 189237689401. The next prime is 189237689449. The reversal of 189237689423 is 324986732981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 189237689423 - 2⁸ = 189237689167 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 (189237689453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94618844711 + 94618844712.

It is an arithmetic number, because the mean of its divisors is an integer number (94618844712).

Almost surely, 2^189237689423 is an apocalyptic number.

189237689423 is a deficient number, since it is larger than the sum of its proper divisors (1).

189237689423 is an equidigital number, since it uses as much as digits as its factorization.

189237689423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31352832, while the sum is 62.

The spelling of 189237689423 in words is "one hundred eighty-nine billion, two hundred thirty-seven million, six hundred eighty-nine thousand, four hundred twenty-three".