185140829 has 4 divisors (see below), whose sum is σ = 196031484. Its totient is φ = 174250176.

The previous prime is 185140811. The next prime is 185140867. The reversal of 185140829 is 928041581.

185140829 = 2317² + 2318² + ... + 2350².

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 928041581 = 331 ⋅2803751.

It can be written as a sum of positive squares in 2 ways, for example, as 138532900 + 46607929 = 11770^2 + 6827^2 .

It is a cyclic number.

It is not a de Polignac number, because 185140829 - 2¹² = 185136733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 185140792 and 185140801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (185140729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5445302 + ... + 5445335.

It is an arithmetic number, because the mean of its divisors is an integer number (49007871).

Almost surely, 2^185140829 is an apocalyptic number.

It is an amenable number.

185140829 is a deficient number, since it is larger than the sum of its proper divisors (10890655).

185140829 is a wasteful number, since it uses less digits than its factorization.

185140829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10890654.

The product of its (nonzero) digits is 23040, while the sum is 38.

The square root of 185140829 is about 13606.6465008833. The cubic root of 185140829 is about 569.9464697858.

The spelling of 185140829 in words is "one hundred eighty-five million, one hundred forty thousand, eight hundred twenty-nine".