84649799 has 4 divisors (see below), whose sum is σ = 91161336. Its totient is φ = 78138264.

The previous prime is 84649793. The next prime is 84649813. The reversal of 84649799 is 99794648.

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

It is a cyclic number.

It is not a de Polignac number, because 84649799 - 2¹⁶ = 84584263 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 (84649793) 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, 3255749 + ... + 3255774.

It is an arithmetic number, because the mean of its divisors is an integer number (22790334).

Almost surely, 2^84649799 is an apocalyptic number.

84649799 is a deficient number, since it is larger than the sum of its proper divisors (6511537).

84649799 is a wasteful number, since it uses less digits than its factorization.

84649799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6511536.

The product of its digits is 3919104, while the sum is 56.

The square root of 84649799 is about 9200.5325389349. The cubic root of 84649799 is about 439.0783030469.

The spelling of 84649799 in words is "eighty-four million, six hundred forty-nine thousand, seven hundred ninety-nine".