189455407 has 8 divisors (see below), whose sum is σ = 191782800. Its totient is φ = 187138944.

The previous prime is 189455381. The next prime is 189455467. The reversal of 189455407 is 704554981.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189455407 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 (189455467) 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, 35319 + ... + 40327.

It is an arithmetic number, because the mean of its divisors is an integer number (23972850).

Almost surely, 2^189455407 is an apocalyptic number.

189455407 is a deficient number, since it is larger than the sum of its proper divisors (2327393).

189455407 is a wasteful number, since it uses less digits than its factorization.

189455407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5465.

The product of its (nonzero) digits is 201600, while the sum is 43.

The square root of 189455407 is about 13764.2801119419. The cubic root of 189455407 is about 574.3399175196.

The spelling of 189455407 in words is "one hundred eighty-nine million, four hundred fifty-five thousand, four hundred seven".