189967730 has 8 divisors (see below), whose sum is σ = 341941932. Its totient is φ = 75987088.

The previous prime is 189967727. The next prime is 189967733. The reversal of 189967730 is 37769981.

It is an interprime number because it is at equal distance from previous prime (189967727) and next prime (189967733).

It can be written as a sum of positive squares in 2 ways, for example, as 183521209 + 6446521 = 13547^2 + 2539^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (189967733) 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, 9498377 + ... + 9498396.

Almost surely, 2^189967730 is an apocalyptic number.

189967730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189967730 is a deficient number, since it is larger than the sum of its proper divisors (151974202).

189967730 is a wasteful number, since it uses less digits than its factorization.

189967730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18996780.

The product of its (nonzero) digits is 571536, while the sum is 50.

The square root of 189967730 is about 13782.8781464540. The cubic root of 189967730 is about 574.8571592256.

The spelling of 189967730 in words is "one hundred eighty-nine million, nine hundred sixty-seven thousand, seven hundred thirty".