84977661 has 8 divisors (see below), whose sum is σ = 113629600. Its totient is φ = 56488752.

The previous prime is 84977657. The next prime is 84977687. The reversal of 84977661 is 16677948.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 84977661 - 2² = 84977657 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 84977661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84977561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39535 + ... + 41628.

It is an arithmetic number, because the mean of its divisors is an integer number (14203700).

Almost surely, 2^84977661 is an apocalyptic number.

It is an amenable number.

84977661 is a deficient number, since it is larger than the sum of its proper divisors (28651939).

84977661 is a wasteful number, since it uses less digits than its factorization.

84977661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81515.

The product of its digits is 508032, while the sum is 48.

The square root of 84977661 is about 9218.3328753089. The cubic root of 84977661 is about 439.6444458888.

The spelling of 84977661 in words is "eighty-four million, nine hundred seventy-seven thousand, six hundred sixty-one".