186994049 has 8 divisors (see below), whose sum is σ = 206867520. Its totient is φ = 167599600.

The previous prime is 186994019. The next prime is 186994051. The reversal of 186994049 is 940499681.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 186994049 - 2¹⁶ = 186928513 is a prime.

It is a super-2 number, since 2×186994049² = 69933548722828802, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 186993988 and 186994006.

It is not an unprimeable number, because it can be changed into a prime (186994009) 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, 118934 + ... + 120495.

It is an arithmetic number, because the mean of its divisors is an integer number (25858440).

Almost surely, 2^186994049 is an apocalyptic number.

It is an amenable number.

186994049 is a deficient number, since it is larger than the sum of its proper divisors (19873471).

186994049 is a wasteful number, since it uses less digits than its factorization.

186994049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239511.

The product of its (nonzero) digits is 559872, while the sum is 50.

The square root of 186994049 is about 13674.5767393364. The cubic root of 186994049 is about 571.8418403499.

The spelling of 186994049 in words is "one hundred eighty-six million, nine hundred ninety-four thousand, forty-nine".