84646649 has 4 divisors (see below), whose sum is σ = 84898164. Its totient is φ = 84395136.

The previous prime is 84646619. The next prime is 84646657. The reversal of 84646649 is 94664648.

It is a happy number.

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 11424400 + 73222249 = 3380^2 + 8557^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84646649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84646619) 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, 125252 + ... + 125925.

It is an arithmetic number, because the mean of its divisors is an integer number (21224541).

Almost surely, 2^84646649 is an apocalyptic number.

It is an amenable number.

84646649 is a deficient number, since it is larger than the sum of its proper divisors (251515).

84646649 is a wasteful number, since it uses less digits than its factorization.

84646649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251514.

The product of its digits is 995328, while the sum is 47.

The square root of 84646649 is about 9200.3613515992. The cubic root of 84646649 is about 439.0728566319.

The spelling of 84646649 in words is "eighty-four million, six hundred forty-six thousand, six hundred forty-nine".