84627891 has 6 divisors (see below), whose sum is σ = 122240300. Its totient is φ = 56418588.

The previous prime is 84627863. The next prime is 84627899. The reversal of 84627891 is 19872648.

It is not a de Polignac number, because 84627891 - 2¹¹ = 84625843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84627899) 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, 4701541 + ... + 4701558.

Almost surely, 2^84627891 is an apocalyptic number.

84627891 is a deficient number, since it is larger than the sum of its proper divisors (37612409).

84627891 is a wasteful number, since it uses less digits than its factorization.

84627891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9403105 (or 9403102 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 84627891 is about 9199.3418786346. The cubic root of 84627891 is about 439.0404208643.

The spelling of 84627891 in words is "eighty-four million, six hundred twenty-seven thousand, eight hundred ninety-one".