189706769 has 16 divisors (see below), whose sum is σ = 221985792. Its totient is φ = 158753088.

The previous prime is 189706679. The next prime is 189706799. The reversal of 189706769 is 967607981.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 189706769 - 2¹² = 189702673 is a prime.

It is a super-2 number, since 2×189706769² = 71977316408838722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 189706769.

It is not an unprimeable number, because it can be changed into a prime (189706799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81587 + ... + 83879.

It is an arithmetic number, because the mean of its divisors is an integer number (13874112).

Almost surely, 2^189706769 is an apocalyptic number.

It is an amenable number.

189706769 is a deficient number, since it is larger than the sum of its proper divisors (32279023).

189706769 is a wasteful number, since it uses less digits than its factorization.

189706769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2576.

The product of its (nonzero) digits is 1143072, while the sum is 53.

The square root of 189706769 is about 13773.4080386809. The cubic root of 189706769 is about 574.5938091569.

The spelling of 189706769 in words is "one hundred eighty-nine million, seven hundred six thousand, seven hundred sixty-nine".