86574997 has 4 divisors (see below), whose sum is σ = 86676876. Its totient is φ = 86473120.

The previous prime is 86574977. The next prime is 86575051. The reversal of 86574997 is 79947568.

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 35509681 + 51065316 = 5959^2 + 7146^2 .

It is a cyclic number.

It is not a de Polignac number, because 86574997 - 2¹⁵ = 86542229 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 (86574907) 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, 49654 + ... + 51367.

It is an arithmetic number, because the mean of its divisors is an integer number (21669219).

Almost surely, 2^86574997 is an apocalyptic number.

It is an amenable number.

86574997 is a deficient number, since it is larger than the sum of its proper divisors (101879).

86574997 is a wasteful number, since it uses less digits than its factorization.

86574997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101878.

The product of its digits is 3810240, while the sum is 55.

The square root of 86574997 is about 9304.5686090221. The cubic root of 86574997 is about 442.3820482111.

It can be divided in two parts, 86574 and 997, that added together give a triangular number (87571 = T₄₁₈).

The spelling of 86574997 in words is "eighty-six million, five hundred seventy-four thousand, nine hundred ninety-seven".