84627621 has 48 divisors (see below), whose sum is σ = 137185776. Its totient is φ = 49932288.

The previous prime is 84627617. The next prime is 84627661. The reversal of 84627621 is 12672648.

84627621 is a `hidden beast` number, since 8 + 4 + 6 + 27 + 621 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 245025 + 84382596 = 495^2 + 9186^2 .

It is not a de Polignac number, because 84627621 - 2² = 84627617 is a prime.

It is a super-2 number, since 2×84627621² = 14323668472239282, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84627661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 489091 + ... + 489263.

It is an arithmetic number, because the mean of its divisors is an integer number (2858037).

Almost surely, 2^84627621 is an apocalyptic number.

It is an amenable number.

84627621 is a deficient number, since it is larger than the sum of its proper divisors (52558155).

84627621 is a wasteful number, since it uses less digits than its factorization.

84627621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342 (or 339 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 84627621 is about 9199.3272036601. The cubic root of 84627621 is about 439.0399539534.

The spelling of 84627621 in words is "eighty-four million, six hundred twenty-seven thousand, six hundred twenty-one".