84705647954 has 4 divisors (see below), whose sum is σ = 127058471934. Its totient is φ = 42352823976.

The previous prime is 84705647921. The next prime is 84705647959. The reversal of 84705647954 is 45974650748.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 45082754929 + 39622893025 = 212327^2 + 199055^2 .

It is a super-2 number, since 2×84705647954² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 84705647893 and 84705647902.

It is not an unprimeable number, because it can be changed into a prime (84705647959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21176411987 + ... + 21176411990.

Almost surely, 2^84705647954 is an apocalyptic number.

84705647954 is a deficient number, since it is larger than the sum of its proper divisors (42352823980).

84705647954 is a wasteful number, since it uses less digits than its factorization.

84705647954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42352823979.

The product of its (nonzero) digits is 33868800, while the sum is 59.

The spelling of 84705647954 in words is "eighty-four billion, seven hundred five million, six hundred forty-seven thousand, nine hundred fifty-four".