84784386131 has 4 divisors (see below), whose sum is σ = 85945816152. Its totient is φ = 83622956112.

The previous prime is 84784386101. The next prime is 84784386227. The reversal of 84784386131 is 13168348748.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84784386131 is a prime.

It is a super-2 number, since 2×84784386131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84784386101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 580714901 + ... + 580715046.

It is an arithmetic number, because the mean of its divisors is an integer number (21486454038).

Almost surely, 2^84784386131 is an apocalyptic number.

84784386131 is a deficient number, since it is larger than the sum of its proper divisors (1161430021).

84784386131 is a wasteful number, since it uses less digits than its factorization.

84784386131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161430020.

The product of its digits is 3096576, while the sum is 53.

The spelling of 84784386131 in words is "eighty-four billion, seven hundred eighty-four million, three hundred eighty-six thousand, one hundred thirty-one".