189090002 has 8 divisors (see below), whose sum is σ = 287520636. Its totient is φ = 93249792.

The previous prime is 189089993. The next prime is 189090007. The reversal of 189090002 is 200090981.

It is a Cunningham number, because it is equal to 13751²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 189090001 + 1 = 13751^2 + 1^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (189090007) 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, 647423 + ... + 647714.

Almost surely, 2^189090002 is an apocalyptic number.

189090002 is a deficient number, since it is larger than the sum of its proper divisors (98430634).

189090002 is a wasteful number, since it uses less digits than its factorization.

189090002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1295212.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 189090002 is about 13751.0000363610. Note that the first 4 decimals coincide. The cubic root of 189090002 is about 573.9704343612.

The spelling of 189090002 in words is "one hundred eighty-nine million, ninety thousand, two".