189214749 has 24 divisors (see below), whose sum is σ = 294396960. Its totient is φ = 116720352.

The previous prime is 189214747. The next prime is 189214769. The reversal of 189214749 is 947412981.

It is a happy number.

It is not a de Polignac number, because 189214749 - 2¹ = 189214747 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189214747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5514 + ... + 20219.

It is an arithmetic number, because the mean of its divisors is an integer number (12266540).

Almost surely, 2^189214749 is an apocalyptic number.

189214749 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

189214749 is the 7353-rd nonagonal number.

It is an amenable number.

189214749 is a deficient number, since it is larger than the sum of its proper divisors (105182211).

189214749 is a wasteful number, since it uses less digits than its factorization.

189214749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25801 (or 25798 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 189214749 is about 13755.5352131424. The cubic root of 189214749 is about 574.0966270898.

It can be divided in two parts, 1892 and 14749, that added together give a square (16641 = 129²).

The spelling of 189214749 in words is "one hundred eighty-nine million, two hundred fourteen thousand, seven hundred forty-nine".