84739887 has 6 divisors (see below), whose sum is σ = 122402072. Its totient is φ = 56493252.

The previous prime is 84739819. The next prime is 84739901. The reversal of 84739887 is 78893748.

84739887 is a `hidden beast` number, since 8 + 473 + 98 + 87 = 666.

It is not a de Polignac number, because 84739887 - 2¹⁴ = 84723503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84739387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4707763 + ... + 4707780.

Almost surely, 2^84739887 is an apocalyptic number.

84739887 is a deficient number, since it is larger than the sum of its proper divisors (37662185).

84739887 is a wasteful number, since it uses less digits than its factorization.

84739887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9415549 (or 9415546 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 54.

The square root of 84739887 is about 9205.4270406103. The cubic root of 84739887 is about 439.2340099028.

The spelling of 84739887 in words is "eighty-four million, seven hundred thirty-nine thousand, eight hundred eighty-seven".