84745405 has 4 divisors (see below), whose sum is σ = 101694492. Its totient is φ = 67796320.

The previous prime is 84745403. The next prime is 84745421. The reversal of 84745405 is 50454748.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14638276 + 70107129 = 3826^2 + 8373^2 .

It is not a de Polignac number, because 84745405 - 2¹ = 84745403 is a prime.

It is a super-2 number, since 2×84745405² = 14363567337228050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84745403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8474536 + ... + 8474545.

It is an arithmetic number, because the mean of its divisors is an integer number (25423623).

Almost surely, 2^84745405 is an apocalyptic number.

It is an amenable number.

84745405 is a deficient number, since it is larger than the sum of its proper divisors (16949087).

84745405 is a wasteful number, since it uses less digits than its factorization.

84745405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16949086.

The product of its (nonzero) digits is 89600, while the sum is 37.

The square root of 84745405 is about 9205.7267502354. The cubic root of 84745405 is about 439.2435435504.

The spelling of 84745405 in words is "eighty-four million, seven hundred forty-five thousand, four hundred five".