189657969 has 16 divisors (see below), whose sum is σ = 264720384. Its totient is φ = 120632400.

The previous prime is 189657961. The next prime is 189658003. The reversal of 189657969 is 969756981.

It is not a de Polignac number, because 189657969 - 2³ = 189657961 is a prime.

It is a super-2 number, since 2×189657969² = 71940290410409922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (189657961) 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 15 ways as a sum of consecutive naturals, for example, 7759 + ... + 20964.

It is an arithmetic number, because the mean of its divisors is an integer number (16545024).

Almost surely, 2^189657969 is an apocalyptic number.

It is an amenable number.

189657969 is a deficient number, since it is larger than the sum of its proper divisors (75062415).

189657969 is a wasteful number, since it uses less digits than its factorization.

189657969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28828.

The product of its digits is 7348320, while the sum is 60.

The square root of 189657969 is about 13771.6363951420. The cubic root of 189657969 is about 574.5445355987.

The spelling of 189657969 in words is "one hundred eighty-nine million, six hundred fifty-seven thousand, nine hundred sixty-nine".