84531997 has 8 divisors (see below), whose sum is σ = 93113280. Its totient is φ = 76100160.

The previous prime is 84531989. The next prime is 84532027. The reversal of 84531997 is 79913548.

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 84531997 - 2³ = 84531989 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 (84531917) 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, 36172 + ... + 38437.

It is an arithmetic number, because the mean of its divisors is an integer number (11639160).

Almost surely, 2^84531997 is an apocalyptic number.

It is an amenable number.

84531997 is a deficient number, since it is larger than the sum of its proper divisors (8581283).

84531997 is a wasteful number, since it uses less digits than its factorization.

84531997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74723.

The product of its digits is 272160, while the sum is 46.

The square root of 84531997 is about 9194.1283980593. The cubic root of 84531997 is about 438.8745289278.

The spelling of 84531997 in words is "eighty-four million, five hundred thirty-one thousand, nine hundred ninety-seven".