84019797 has 12 divisors (see below), whose sum is σ = 128501100. Its totient is φ = 52718208.

The previous prime is 84019777. The next prime is 84019799. The reversal of 84019797 is 79791048.

It can be written as a sum of positive squares in 2 ways, for example, as 41912676 + 42107121 = 6474^2 + 6489^2 .

It is not a de Polignac number, because 84019797 - 2⁷ = 84019669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84019799) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 274422 + ... + 274727.

It is an arithmetic number, because the mean of its divisors is an integer number (10708425).

Almost surely, 2^84019797 is an apocalyptic number.

It is an amenable number.

84019797 is a deficient number, since it is larger than the sum of its proper divisors (44481303).

84019797 is a wasteful number, since it uses less digits than its factorization.

84019797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549172 (or 549169 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 84019797 is about 9166.2313411783. The cubic root of 84019797 is about 437.9863165801.

The spelling of 84019797 in words is "eighty-four million, nineteen thousand, seven hundred ninety-seven".