189972783 has 144 divisors (see below), whose sum is σ = 390394368. Its totient is φ = 89812800.

The previous prime is 189972781. The next prime is 189972821. The reversal of 189972783 is 387279981.

189972783 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 189972783 - 2¹ = 189972781 is a prime.

Its product of digits (1524096) is a multiple of the sum of its prime factors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189972781) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 2675638 + ... + 2675708.

It is an arithmetic number, because the mean of its divisors is an integer number (2711072).

Almost surely, 2^189972783 is an apocalyptic number.

189972783 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

189972783 is an abundant number, since it is smaller than the sum of its proper divisors (200421585).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

189972783 is a wasteful number, since it uses less digits than its factorization.

189972783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128 (or 105 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 54.

The square root of 189972783 is about 13783.0614523770. The cubic root of 189972783 is about 574.8622561044.

The spelling of 189972783 in words is "one hundred eighty-nine million, nine hundred seventy-two thousand, seven hundred eighty-three".