84215497 has 8 divisors (see below), whose sum is σ = 85269800. Its totient is φ = 83165184.

The previous prime is 84215491. The next prime is 84215519. The reversal of 84215497 is 79451248.

It can be written as a sum of positive squares in 4 ways, for example, as 383161 + 83832336 = 619^2 + 9156^2 .

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 84215497 - 2¹⁵ = 84182729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84215491) 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, 74029 + ... + 75157.

It is an arithmetic number, because the mean of its divisors is an integer number (10658725).

Almost surely, 2^84215497 is an apocalyptic number.

It is an amenable number.

84215497 is a deficient number, since it is larger than the sum of its proper divisors (1054303).

84215497 is a wasteful number, since it uses less digits than its factorization.

84215497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1995.

The product of its digits is 80640, while the sum is 40.

The square root of 84215497 is about 9176.9001847029. The cubic root of 84215497 is about 438.3261073696.

The spelling of 84215497 in words is "eighty-four million, two hundred fifteen thousand, four hundred ninety-seven".