86744471 has 4 divisors (see below), whose sum is σ = 94630344. Its totient is φ = 78858600.

The previous prime is 86744467. The next prime is 86744491. The reversal of 86744471 is 17444768.

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 86744471 - 2² = 86744467 is a prime.

It is a super-3 number, since 3×86744471³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86744461) 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, 3942920 + ... + 3942941.

It is an arithmetic number, because the mean of its divisors is an integer number (23657586).

Almost surely, 2^86744471 is an apocalyptic number.

86744471 is a deficient number, since it is larger than the sum of its proper divisors (7885873).

86744471 is a wasteful number, since it uses less digits than its factorization.

86744471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7885872.

The product of its digits is 150528, while the sum is 41.

The square root of 86744471 is about 9313.6711880976. The cubic root of 86744471 is about 442.6705202126.

The spelling of 86744471 in words is "eighty-six million, seven hundred forty-four thousand, four hundred seventy-one".