189802654249 has 4 divisors (see below), whose sum is σ = 204402858436. Its totient is φ = 175202450064.

The previous prime is 189802654247. The next prime is 189802654259. The reversal of 189802654249 is 942456208981.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 91184673024 + 98617981225 = 301968^2 + 314035^2 .

It is a cyclic number.

It is not a de Polignac number, because 189802654249 - 2¹ = 189802654247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 189802654193 and 189802654202.

It is not an unprimeable number, because it can be changed into a prime (189802654247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7300102074 + ... + 7300102099.

It is an arithmetic number, because the mean of its divisors is an integer number (51100714609).

Almost surely, 2^189802654249 is an apocalyptic number.

It is an amenable number.

189802654249 is a deficient number, since it is larger than the sum of its proper divisors (14600204187).

189802654249 is a wasteful number, since it uses less digits than its factorization.

189802654249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14600204186.

The product of its (nonzero) digits is 9953280, while the sum is 58.

The spelling of 189802654249 in words is "one hundred eighty-nine billion, eight hundred two million, six hundred fifty-four thousand, two hundred forty-nine".