83785145 has 4 divisors (see below), whose sum is σ = 100542180. Its totient is φ = 67028112.

The previous prime is 83785127. The next prime is 83785153. The reversal of 83785145 is 54158738.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54158738 = 2 ⋅27079369.

It can be written as a sum of positive squares in 2 ways, for example, as 52301824 + 31483321 = 7232^2 + 5611^2 .

It is a cyclic number.

It is not a de Polignac number, because 83785145 - 2¹⁰ = 83784121 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8378510 + ... + 8378519.

It is an arithmetic number, because the mean of its divisors is an integer number (25135545).

Almost surely, 2^83785145 is an apocalyptic number.

It is an amenable number.

83785145 is a deficient number, since it is larger than the sum of its proper divisors (16757035).

83785145 is a wasteful number, since it uses less digits than its factorization.

83785145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16757034.

The product of its digits is 134400, while the sum is 41.

The square root of 83785145 is about 9153.4225839300. The cubic root of 83785145 is about 437.5781977230.

The spelling of 83785145 in words is "eighty-three million, seven hundred eighty-five thousand, one hundred forty-five".