189749102404 has 27 divisors (see below), whose sum is σ = 333544866487. Its totient is φ = 94452452864.

The previous prime is 189749102383. The next prime is 189749102407. The reversal of 189749102404 is 404201947981.

It is a happy number.

The square root of 189749102404 is 435602.

It is a perfect power (a square), and thus also a powerful number.

189749102404 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 80373384004 + 109375718400 = 283502^2 + 330720^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189749102407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 307534704 + ... + 307535320.

Almost surely, 2^189749102404 is an apocalyptic number.

189749102404 is the 435602-nd square number.

It is an amenable number.

189749102404 is a deficient number, since it is larger than the sum of its proper divisors (143795764083).

189749102404 is an frugal number, since it uses more digits than its factorization.

189749102404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1944 (or 972 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 49.

Multiplying 189749102404 by its sum of digits (49), we get a square (9297706017796 = 3049214²).

The spelling of 189749102404 in words is "one hundred eighty-nine billion, seven hundred forty-nine million, one hundred two thousand, four hundred four".