189378001 has 4 divisors (see below), whose sum is σ = 189612900. Its totient is φ = 189143104.

The previous prime is 189377989. The next prime is 189378053. The reversal of 189378001 is 100873981.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 164865600 + 24512401 = 12840^2 + 4951^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189378001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189378071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116236 + ... + 117853.

It is an arithmetic number, because the mean of its divisors is an integer number (47403225).

Almost surely, 2^189378001 is an apocalyptic number.

It is an amenable number.

189378001 is a deficient number, since it is larger than the sum of its proper divisors (234899).

189378001 is an equidigital number, since it uses as much as digits as its factorization.

189378001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234898.

The product of its (nonzero) digits is 12096, while the sum is 37.

The square root of 189378001 is about 13761.4679812875. The cubic root of 189378001 is about 574.2616873046.

The spelling of 189378001 in words is "one hundred eighty-nine million, three hundred seventy-eight thousand, one".