189129469 has 4 divisors (see below), whose sum is σ = 191002140. Its totient is φ = 187256800.

The previous prime is 189129467. The next prime is 189129487. The reversal of 189129469 is 964921981.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 964921981 = 617 ⋅1563893.

It can be written as a sum of positive squares in 2 ways, for example, as 84824100 + 104305369 = 9210^2 + 10213^2 .

It is a cyclic number.

It is not a de Polignac number, because 189129469 - 2¹ = 189129467 is a prime.

It is a super-2 number, since 2×189129469² = 71539912088443922, 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 (189129467) 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 3 ways as a sum of consecutive naturals, for example, 936184 + ... + 936385.

It is an arithmetic number, because the mean of its divisors is an integer number (47750535).

Almost surely, 2^189129469 is an apocalyptic number.

It is an amenable number.

189129469 is a deficient number, since it is larger than the sum of its proper divisors (1872671).

189129469 is a wasteful number, since it uses less digits than its factorization.

189129469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1872670.

The product of its digits is 279936, while the sum is 49.

The square root of 189129469 is about 13752.4350207518. The cubic root of 189129469 is about 574.0103647560.

The spelling of 189129469 in words is "one hundred eighty-nine million, one hundred twenty-nine thousand, four hundred sixty-nine".