83850649 has 3 divisors (see below), whose sum is σ = 83859807. Its totient is φ = 83841492.

The previous prime is 83850643. The next prime is 83850653. The reversal of 83850649 is 94605838.

The square root of 83850649 is 9157.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 11055625 + 72795024 = 3325^2 + 8532^2 .

It is not a de Polignac number, because 83850649 - 2¹¹ = 83848601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83850643) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4579 + ... + 13735.

It is an arithmetic number, because the mean of its divisors is an integer number (27953269).

Almost surely, 2^83850649 is an apocalyptic number.

83850649 is the 9157-th square number.

83850649 is the 4579-th centered octagonal number.

It is an amenable number.

83850649 is a deficient number, since it is larger than the sum of its proper divisors (9158).

83850649 is an frugal number, since it uses more digits than its factorization.

83850649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18314 (or 9157 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 43.

The cubic root of 83850649 is about 437.6922022433.

The spelling of 83850649 in words is "eighty-three million, eight hundred fifty thousand, six hundred forty-nine".