86670431 has 4 divisors (see below), whose sum is σ = 86750112. Its totient is φ = 86590752.

The previous prime is 86670401. The next prime is 86670449. The reversal of 86670431 is 13407668.

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

It is a cyclic number.

It is not a de Polignac number, because 86670431 - 2¹⁴ = 86654047 is a prime.

It is a super-2 number, since 2×86670431² = 15023527219451522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 86670391 and 86670400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86670401) 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, 38186 + ... + 40391.

It is an arithmetic number, because the mean of its divisors is an integer number (21687528).

Almost surely, 2^86670431 is an apocalyptic number.

86670431 is a deficient number, since it is larger than the sum of its proper divisors (79681).

86670431 is a wasteful number, since it uses less digits than its factorization.

86670431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79680.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 86670431 is about 9309.6955374491. The cubic root of 86670431 is about 442.5445384857.

The spelling of 86670431 in words is "eighty-six million, six hundred seventy thousand, four hundred thirty-one".