84640349 has 4 divisors (see below), whose sum is σ = 86927964. Its totient is φ = 82352736.

The previous prime is 84640337. The next prime is 84640351. The reversal of 84640349 is 94304648.

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 53392249 + 31248100 = 7307^2 + 5590^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84640349 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 (84640379) 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, 1143752 + ... + 1143825.

It is an arithmetic number, because the mean of its divisors is an integer number (21731991).

Almost surely, 2^84640349 is an apocalyptic number.

It is an amenable number.

84640349 is a deficient number, since it is larger than the sum of its proper divisors (2287615).

84640349 is a wasteful number, since it uses less digits than its factorization.

84640349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2287614.

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 84640349 is about 9200.0189673718. The cubic root of 84640349 is about 439.0619633965.

The spelling of 84640349 in words is "eighty-four million, six hundred forty thousand, three hundred forty-nine".