189629409 has 4 divisors (see below), whose sum is σ = 252839216. Its totient is φ = 126419604.

The previous prime is 189629383. The next prime is 189629417. The reversal of 189629409 is 904926981.

189629409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 189629409 - 2⁷ = 189629281 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 (189629459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31604899 + ... + 31604904.

It is an arithmetic number, because the mean of its divisors is an integer number (63209804).

Almost surely, 2^189629409 is an apocalyptic number.

It is an amenable number.

189629409 is a deficient number, since it is larger than the sum of its proper divisors (63209807).

189629409 is an equidigital number, since it uses as much as digits as its factorization.

189629409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63209806.

The product of its (nonzero) digits is 279936, while the sum is 48.

The square root of 189629409 is about 13770.5994422901. The cubic root of 189629409 is about 574.5156945298.

The spelling of 189629409 in words is "one hundred eighty-nine million, six hundred twenty-nine thousand, four hundred nine".