84781863 has 8 divisors (see below), whose sum is σ = 125602800. Its totient is φ = 56521224.

The previous prime is 84781849. The next prime is 84781883. The reversal of 84781863 is 36818748.

It is not a de Polignac number, because 84781863 - 2⁴ = 84781847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84781813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1570008 + ... + 1570061.

It is an arithmetic number, because the mean of its divisors is an integer number (15700350).

Almost surely, 2^84781863 is an apocalyptic number.

84781863 is a deficient number, since it is larger than the sum of its proper divisors (40820937).

84781863 is a wasteful number, since it uses less digits than its factorization.

84781863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3140078 (or 3140072 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 84781863 is about 9207.7067177447. The cubic root of 84781863 is about 439.3065229541.

The spelling of 84781863 in words is "eighty-four million, seven hundred eighty-one thousand, eight hundred sixty-three".