189237689407 has 4 divisors (see below), whose sum is σ = 203794434760. Its totient is φ = 174680944056.

The previous prime is 189237689401. The next prime is 189237689423. The reversal of 189237689407 is 704986732981.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189237689407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189237689401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7278372657 + ... + 7278372682.

It is an arithmetic number, because the mean of its divisors is an integer number (50948608690).

Almost surely, 2^189237689407 is an apocalyptic number.

189237689407 is a deficient number, since it is larger than the sum of its proper divisors (14556745353).

189237689407 is a wasteful number, since it uses less digits than its factorization.

189237689407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14556745352.

The product of its (nonzero) digits is 36578304, while the sum is 64.

The spelling of 189237689407 in words is "one hundred eighty-nine billion, two hundred thirty-seven million, six hundred eighty-nine thousand, four hundred seven".