84117749 has 8 divisors (see below), whose sum is σ = 85208760. Its totient is φ = 83032000.

The previous prime is 84117713. The next prime is 84117757. The reversal of 84117749 is 94771148.

It can be written as a sum of positive squares in 4 ways, for example, as 45900625 + 38217124 = 6775^2 + 6182^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84117749 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 (84110749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38219 + ... + 40359.

It is an arithmetic number, because the mean of its divisors is an integer number (10651095).

Almost surely, 2^84117749 is an apocalyptic number.

It is an amenable number.

84117749 is a deficient number, since it is larger than the sum of its proper divisors (1091011).

84117749 is a wasteful number, since it uses less digits than its factorization.

84117749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2631.

The product of its digits is 56448, while the sum is 41.

The square root of 84117749 is about 9171.5728749217. The cubic root of 84117749 is about 438.1564549528.

The spelling of 84117749 in words is "eighty-four million, one hundred seventeen thousand, seven hundred forty-nine".