8185990349 has 4 divisors (see below), whose sum is σ = 8289610560. Its totient is φ = 8082370140.

The previous prime is 8185990313. The next prime is 8185990357. The reversal of 8185990349 is 9430995818.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8185990349 is a prime.

It is a super-2 number, since 2×8185990349² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 8185990294 and 8185990303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8185990649) 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, 51809987 + ... + 51810144.

It is an arithmetic number, because the mean of its divisors is an integer number (2072402640).

Almost surely, 2^8185990349 is an apocalyptic number.

It is an amenable number.

8185990349 is a deficient number, since it is larger than the sum of its proper divisors (103620211).

8185990349 is a wasteful number, since it uses less digits than its factorization.

8185990349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103620210.

The product of its (nonzero) digits is 2799360, while the sum is 56.

The square root of 8185990349 is about 90476.4629558428. The cubic root of 8185990349 is about 2015.3806109463.

The spelling of 8185990349 in words is "eight billion, one hundred eighty-five million, nine hundred ninety thousand, three hundred forty-nine".