84817742 has 4 divisors (see below), whose sum is σ = 127226616. Its totient is φ = 42408870.

The previous prime is 84817741. The next prime is 84817753. The reversal of 84817742 is 24771848.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 84817742.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84817741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21204434 + ... + 21204437.

It is an arithmetic number, because the mean of its divisors is an integer number (31806654).

Almost surely, 2^84817742 is an apocalyptic number.

84817742 is a deficient number, since it is larger than the sum of its proper divisors (42408874).

84817742 is a wasteful number, since it uses less digits than its factorization.

84817742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42408873.

The product of its digits is 100352, while the sum is 41.

The square root of 84817742 is about 9209.6548252364. The cubic root of 84817742 is about 439.3684845391.

The spelling of 84817742 in words is "eighty-four million, eight hundred seventeen thousand, seven hundred forty-two".