83556149 has 4 divisors (see below), whose sum is σ = 83574636. Its totient is φ = 83537664.

The previous prime is 83556131. The next prime is 83556157. The reversal of 83556149 is 94165538.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 47472100 + 36084049 = 6890^2 + 6007^2 .

It is a cyclic number.

It is not a de Polignac number, because 83556149 - 2⁸ = 83555893 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 (83556119) 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, 2567 + ... + 13179.

It is an arithmetic number, because the mean of its divisors is an integer number (20893659).

Almost surely, 2^83556149 is an apocalyptic number.

It is an amenable number.

83556149 is a deficient number, since it is larger than the sum of its proper divisors (18487).

83556149 is a wasteful number, since it uses less digits than its factorization.

83556149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18486.

The product of its digits is 129600, while the sum is 41.

The square root of 83556149 is about 9140.9052615154. The cubic root of 83556149 is about 437.1791807460.

The spelling of 83556149 in words is "eighty-three million, five hundred fifty-six thousand, one hundred forty-nine".