84397563021 has 16 divisors (see below), whose sum is σ = 114015021120. Its totient is φ = 55526688000.

The previous prime is 84397563017. The next prime is 84397563031. The reversal of 84397563021 is 12036579348.

It is not a de Polignac number, because 84397563021 - 2² = 84397563017 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84397563001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 432060 + ... + 596213.

It is an arithmetic number, because the mean of its divisors is an integer number (7125938820).

It is a 1-persistent number, because it is pandigital, but 2⋅84397563021 = 168795126042 is not.

Almost surely, 2^84397563021 is an apocalyptic number.

It is an amenable number.

84397563021 is a deficient number, since it is larger than the sum of its proper divisors (29617458099).

84397563021 is a wasteful number, since it uses less digits than its factorization.

84397563021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028636.

The product of its (nonzero) digits is 1088640, while the sum is 48.

The spelling of 84397563021 in words is "eighty-four billion, three hundred ninety-seven million, five hundred sixty-three thousand, twenty-one".