189001651 has 4 divisors (see below), whose sum is σ = 189062704. Its totient is φ = 188940600.

The previous prime is 189001591. The next prime is 189001679. The reversal of 189001651 is 156100981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 156100981 = 41 ⋅3807341.

It is a cyclic number.

It is not a de Polignac number, because 189001651 - 2⁹ = 189001139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189001951) 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, 25620 + ... + 32161.

It is an arithmetic number, because the mean of its divisors is an integer number (47265676).

Almost surely, 2^189001651 is an apocalyptic number.

189001651 is a deficient number, since it is larger than the sum of its proper divisors (61053).

189001651 is an equidigital number, since it uses as much as digits as its factorization.

189001651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61052.

The product of its (nonzero) digits is 2160, while the sum is 31.

The square root of 189001651 is about 13747.7871310259. The cubic root of 189001651 is about 573.8810258583.

The spelling of 189001651 in words is "one hundred eighty-nine million, one thousand, six hundred fifty-one".