189972303 has 8 divisors (see below), whose sum is σ = 253392816. Its totient is φ = 126600000.

The previous prime is 189972287. The next prime is 189972329. The reversal of 189972303 is 303279981.

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

It is not a de Polignac number, because 189972303 - 2⁴ = 189972287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189972383) 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, 1548 + ... + 19553.

It is an arithmetic number, because the mean of its divisors is an integer number (31674102).

Almost surely, 2^189972303 is an apocalyptic number.

189972303 is a deficient number, since it is larger than the sum of its proper divisors (63420513).

189972303 is a wasteful number, since it uses less digits than its factorization.

189972303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24105.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 189972303 is about 13783.0440396888. The cubic root of 189972303 is about 574.8617719401.

The spelling of 189972303 in words is "one hundred eighty-nine million, nine hundred seventy-two thousand, three hundred three".