186429149 has 4 divisors (see below), whose sum is σ = 186475740. Its totient is φ = 186382560.

The previous prime is 186429097. The next prime is 186429151. The reversal of 186429149 is 941924681.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 941924681 = 23 ⋅40953247.

It can be written as a sum of positive squares in 2 ways, for example, as 173106649 + 13322500 = 13157^2 + 3650^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-186429149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (186429049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16664 + ... + 25505.

It is an arithmetic number, because the mean of its divisors is an integer number (46618935).

Almost surely, 2^186429149 is an apocalyptic number.

It is an amenable number.

186429149 is a deficient number, since it is larger than the sum of its proper divisors (46591).

186429149 is an equidigital number, since it uses as much as digits as its factorization.

186429149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46590.

The product of its digits is 124416, while the sum is 44.

The square root of 186429149 is about 13653.9059979187. The cubic root of 186429149 is about 571.2654239811.

It can be divided in two parts, 1864 and 29149, that added together give a palindrome (31013).

The spelling of 186429149 in words is "one hundred eighty-six million, four hundred twenty-nine thousand, one hundred forty-nine".