84740905 has 16 divisors (see below), whose sum is σ = 104801040. Its totient is φ = 65747968.

The previous prime is 84740899. The next prime is 84740923. The reversal of 84740905 is 50904748.

It can be written as a sum of positive squares in 8 ways, for example, as 3884841 + 80856064 = 1971^2 + 8992^2 .

It is a cyclic number.

It is not a de Polignac number, because 84740905 - 2²¹ = 82643753 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 21789 + ... + 25381.

It is an arithmetic number, because the mean of its divisors is an integer number (6550065).

Almost surely, 2^84740905 is an apocalyptic number.

It is an amenable number.

84740905 is a deficient number, since it is larger than the sum of its proper divisors (20060135).

84740905 is a wasteful number, since it uses less digits than its factorization.

84740905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3740.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 84740905 is about 9205.4823339139. The cubic root of 84740905 is about 439.2357687692.

The spelling of 84740905 in words is "eighty-four million, seven hundred forty thousand, nine hundred five".