189690401 has 4 divisors (see below), whose sum is σ = 189764400. Its totient is φ = 189616404.

The previous prime is 189690373. The next prime is 189690439. The reversal of 189690401 is 104096981.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189690401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (189690451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33011 + ... + 38328.

It is an arithmetic number, because the mean of its divisors is an integer number (47441100).

Almost surely, 2^189690401 is an apocalyptic number.

It is an amenable number.

189690401 is a deficient number, since it is larger than the sum of its proper divisors (73999).

189690401 is an equidigital number, since it uses as much as digits as its factorization.

189690401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73998.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 189690401 is about 13772.8138374117. The cubic root of 189690401 is about 574.5772832628.

It can be divided in two parts, 189690 and 401, that added together give a palindrome (190091).

The spelling of 189690401 in words is "one hundred eighty-nine million, six hundred ninety thousand, four hundred one".