189229261 has 8 divisors (see below), whose sum is σ = 215772984. Its totient is φ = 164398080.

The previous prime is 189229247. The next prime is 189229267. The reversal of 189229261 is 162922981.

It can be written as a sum of positive squares in 4 ways, for example, as 688900 + 188540361 = 830^2 + 13731^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189229261 is a prime.

It is a super-2 number, since 2×189229261² = 71615426437212242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189229267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 427900 + ... + 428341.

It is an arithmetic number, because the mean of its divisors is an integer number (26971623).

Almost surely, 2^189229261 is an apocalyptic number.

It is an amenable number.

189229261 is a deficient number, since it is larger than the sum of its proper divisors (26543723).

189229261 is a wasteful number, since it uses less digits than its factorization.

189229261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856271.

The product of its digits is 31104, while the sum is 40.

The square root of 189229261 is about 13756.0626997699. The cubic root of 189229261 is about 574.1113036717. Note that the first 3 decimals are identical.

The spelling of 189229261 in words is "one hundred eighty-nine million, two hundred twenty-nine thousand, two hundred sixty-one".