84597661 has 4 divisors (see below), whose sum is σ = 89574012. Its totient is φ = 79621312.

The previous prime is 84597659. The next prime is 84597683. The reversal of 84597661 is 16679548.

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 49420900 + 35176761 = 7030^2 + 5931^2 .

It is a cyclic number.

It is not a de Polignac number, because 84597661 - 2¹ = 84597659 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 (84597631) 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, 2488150 + ... + 2488183.

It is an arithmetic number, because the mean of its divisors is an integer number (22393503).

Almost surely, 2^84597661 is an apocalyptic number.

It is an amenable number.

84597661 is a deficient number, since it is larger than the sum of its proper divisors (4976351).

84597661 is a wasteful number, since it uses less digits than its factorization.

84597661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4976350.

The product of its digits is 362880, while the sum is 46.

The square root of 84597661 is about 9197.6986795611. The cubic root of 84597661 is about 438.9881379727.

It can be divided in two parts, 84597 and 661, that added together give a palindrome (85258).

The spelling of 84597661 in words is "eighty-four million, five hundred ninety-seven thousand, six hundred sixty-one".