84405997 has 8 divisors (see below), whose sum is σ = 92256416. Its totient is φ = 76749552.

The previous prime is 84405973. The next prime is 84406001. The reversal of 84405997 is 79950448.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84405997 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 (84405907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47583 + ... + 49324.

It is an arithmetic number, because the mean of its divisors is an integer number (11532052).

Almost surely, 2^84405997 is an apocalyptic number.

It is an amenable number.

84405997 is a deficient number, since it is larger than the sum of its proper divisors (7850419).

84405997 is a wasteful number, since it uses less digits than its factorization.

84405997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96987.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 84405997 is about 9187.2736434701. The cubic root of 84405997 is about 438.6563642466.

The spelling of 84405997 in words is "eighty-four million, four hundred five thousand, nine hundred ninety-seven".