83187649 has 4 divisors (see below), whose sum is σ = 83353536. Its totient is φ = 83021764.

The previous prime is 83187623. The next prime is 83187653. The reversal of 83187649 is 94678138.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 94678138 = 2 ⋅47339069.

It is a cyclic number.

It is not a de Polignac number, because 83187649 - 2⁵ = 83187617 is a prime.

It is a super-2 number, since 2×83187649² = 13840369892294402, 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 = 83187599 and 83187608.

It is not an unprimeable number, because it can be changed into a prime (83157649) 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, 82189 + ... + 83194.

It is an arithmetic number, because the mean of its divisors is an integer number (20838384).

Almost surely, 2^83187649 is an apocalyptic number.

It is an amenable number.

83187649 is a deficient number, since it is larger than the sum of its proper divisors (165887).

83187649 is a wasteful number, since it uses less digits than its factorization.

83187649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165886.

The product of its digits is 290304, while the sum is 46.

The square root of 83187649 is about 9120.7263416901. The cubic root of 83187649 is about 436.5355499222.

The spelling of 83187649 in words is "eighty-three million, one hundred eighty-seven thousand, six hundred forty-nine".