189783029521 has 4 divisors (see below), whose sum is σ = 189793999872. Its totient is φ = 189772059172.

The previous prime is 189783029461. The next prime is 189783029531. The reversal of 189783029521 is 125920387981.

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-189783029521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189783029531) 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, 5459185 + ... + 5493838.

It is an arithmetic number, because the mean of its divisors is an integer number (47448499968).

Almost surely, 2^189783029521 is an apocalyptic number.

It is an amenable number.

189783029521 is a deficient number, since it is larger than the sum of its proper divisors (10970351).

189783029521 is a wasteful number, since it uses less digits than its factorization.

189783029521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10970350.

The product of its (nonzero) digits is 2177280, while the sum is 55.

The spelling of 189783029521 in words is "one hundred eighty-nine billion, seven hundred eighty-three million, twenty-nine thousand, five hundred twenty-one".