189143407 has 8 divisors (see below), whose sum is σ = 192204720. Its totient is φ = 186105600.

The previous prime is 189143399. The next prime is 189143417. The reversal of 189143407 is 704341981.

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 189143407 - 2³ = 189143399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189143417) 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, 10719 + ... + 22207.

It is an arithmetic number, because the mean of its divisors is an integer number (24025590).

Almost surely, 2^189143407 is an apocalyptic number.

189143407 is a deficient number, since it is larger than the sum of its proper divisors (3061313).

189143407 is a wasteful number, since it uses less digits than its factorization.

189143407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11753.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 189143407 is about 13752.9417580385. The cubic root of 189143407 is about 574.0244650792.

The spelling of 189143407 in words is "one hundred eighty-nine million, one hundred forty-three thousand, four hundred seven".