189701661 has 8 divisors (see below), whose sum is σ = 253169280. Its totient is φ = 126350912.

The previous prime is 189701653. The next prime is 189701663. The reversal of 189701661 is 166107981.

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

It is a cyclic number.

It is not a de Polignac number, because 189701661 - 2³ = 189701653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189701663) 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, 25356 + ... + 31973.

It is an arithmetic number, because the mean of its divisors is an integer number (31646160).

Almost surely, 2^189701661 is an apocalyptic number.

It is an amenable number.

189701661 is a deficient number, since it is larger than the sum of its proper divisors (63467619).

189701661 is a wasteful number, since it uses less digits than its factorization.

189701661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58435.

The product of its (nonzero) digits is 18144, while the sum is 39.

The square root of 189701661 is about 13773.2226076543. Note that the first 3 decimals coincide. The cubic root of 189701661 is about 574.5886519846.

The spelling of 189701661 in words is "one hundred eighty-nine million, seven hundred one thousand, six hundred sixty-one".