189797901 has 16 divisors (see below), whose sum is σ = 264173568. Its totient is φ = 121089600.

The previous prime is 189797873. The next prime is 189797939. The reversal of 189797901 is 109797981.

It is not a de Polignac number, because 189797901 - 2⁵ = 189797869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189797941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7245 + ... + 20786.

It is an arithmetic number, because the mean of its divisors is an integer number (16510848).

Almost surely, 2^189797901 is an apocalyptic number.

It is an amenable number.

189797901 is a deficient number, since it is larger than the sum of its proper divisors (74375667).

189797901 is a wasteful number, since it uses less digits than its factorization.

189797901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28132.

The product of its (nonzero) digits is 285768, while the sum is 51.

The square root of 189797901 is about 13776.7159003879. The cubic root of 189797901 is about 574.6858028878.

The spelling of 189797901 in words is "one hundred eighty-nine million, seven hundred ninety-seven thousand, nine hundred one".