86721935 has 4 divisors (see below), whose sum is σ = 104066328. Its totient is φ = 69377544.

The previous prime is 86721923. The next prime is 86721953. The reversal of 86721935 is 53912768.

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 86721935 - 2¹⁴ = 86705551 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 86721892 and 86721901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8672189 + ... + 8672198.

It is an arithmetic number, because the mean of its divisors is an integer number (26016582).

Almost surely, 2^86721935 is an apocalyptic number.

86721935 is a deficient number, since it is larger than the sum of its proper divisors (17344393).

86721935 is a wasteful number, since it uses less digits than its factorization.

86721935 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17344392.

The product of its digits is 90720, while the sum is 41.

The square root of 86721935 is about 9312.4612750873. The cubic root of 86721935 is about 442.6321819886.

The spelling of 86721935 in words is "eighty-six million, seven hundred twenty-one thousand, nine hundred thirty-five".