189857001 has 4 divisors (see below), whose sum is σ = 253142672. Its totient is φ = 126571332.

The previous prime is 189856993. The next prime is 189857009. The reversal of 189857001 is 100758981.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (189856993) and next prime (189857009).

It is not a de Polignac number, because 189857001 - 2³ = 189856993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189857009) 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, 31642831 + ... + 31642836.

It is an arithmetic number, because the mean of its divisors is an integer number (63285668).

Almost surely, 2^189857001 is an apocalyptic number.

It is an amenable number.

189857001 is a deficient number, since it is larger than the sum of its proper divisors (63285671).

189857001 is an equidigital number, since it uses as much as digits as its factorization.

189857001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63285670.

The product of its (nonzero) digits is 20160, while the sum is 39.

The square root of 189857001 is about 13778.8606568177. The cubic root of 189857001 is about 574.7454459890.

The spelling of 189857001 in words is "one hundred eighty-nine million, eight hundred fifty-seven thousand, one".