84213661 has 8 divisors (see below), whose sum is σ = 98060544. Its totient is φ = 70820880.

The previous prime is 84213659. The next prime is 84213667. The reversal of 84213661 is 16631248.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 84213661 - 2¹ = 84213659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84213667) 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, 113125 + ... + 113866.

It is an arithmetic number, because the mean of its divisors is an integer number (12257568).

Almost surely, 2^84213661 is an apocalyptic number.

It is an amenable number.

84213661 is a deficient number, since it is larger than the sum of its proper divisors (13846883).

84213661 is a wasteful number, since it uses less digits than its factorization.

84213661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227051.

The product of its digits is 6912, while the sum is 31.

The square root of 84213661 is about 9176.8001503792. The cubic root of 84213661 is about 438.3229219995.

The spelling of 84213661 in words is "eighty-four million, two hundred thirteen thousand, six hundred sixty-one".