84977471 has 4 divisors (see below), whose sum is σ = 85056312. Its totient is φ = 84898632.

The previous prime is 84977447. The next prime is 84977483. The reversal of 84977471 is 17477948.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84977471 is a prime.

It is a super-3 number, since 3×84977471³ (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 (84977411) 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, 37781 + ... + 39966.

It is an arithmetic number, because the mean of its divisors is an integer number (21264078).

Almost surely, 2^84977471 is an apocalyptic number.

84977471 is a deficient number, since it is larger than the sum of its proper divisors (78841).

84977471 is a wasteful number, since it uses less digits than its factorization.

84977471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78840.

The product of its digits is 395136, while the sum is 47.

The square root of 84977471 is about 9218.3225697520. The cubic root of 84977471 is about 439.6441182243.

The spelling of 84977471 in words is "eighty-four million, nine hundred seventy-seven thousand, four hundred seventy-one".