84397517 has 4 divisors (see below), whose sum is σ = 85465920. Its totient is φ = 83329116.

The previous prime is 84397463. The next prime is 84397541. The reversal of 84397517 is 71579348.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 84397517 - 2¹⁴ = 84381133 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 (84397567) 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, 534083 + ... + 534240.

It is an arithmetic number, because the mean of its divisors is an integer number (21366480).

Almost surely, 2^84397517 is an apocalyptic number.

It is an amenable number.

84397517 is a deficient number, since it is larger than the sum of its proper divisors (1068403).

84397517 is a wasteful number, since it uses less digits than its factorization.

84397517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068402.

The product of its digits is 211680, while the sum is 44.

The square root of 84397517 is about 9186.8121239089. The cubic root of 84397517 is about 438.6416736217.

The spelling of 84397517 in words is "eighty-four million, three hundred ninety-seven thousand, five hundred seventeen".