84779397471 has 16 divisors (see below), whose sum is σ = 117102117600. Its totient is φ = 54493638528.

The previous prime is 84779397467. The next prime is 84779397473. The reversal of 84779397471 is 17479397748.

It is a happy number.

It is not a de Polignac number, because 84779397471 - 2² = 84779397467 is a prime.

It is a super-3 number, since 3×84779397471³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84779397473) 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, 625536 + ... + 748901.

It is an arithmetic number, because the mean of its divisors is an integer number (7318882350).

Almost surely, 2^84779397471 is an apocalyptic number.

84779397471 is a deficient number, since it is larger than the sum of its proper divisors (32322720129).

84779397471 is a wasteful number, since it uses less digits than its factorization.

84779397471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1375178.

The product of its digits is 74680704, while the sum is 66.

The spelling of 84779397471 in words is "eighty-four billion, seven hundred seventy-nine million, three hundred ninety-seven thousand, four hundred seventy-one".