83140445 has 4 divisors (see below), whose sum is σ = 99768540. Its totient is φ = 66512352.

The previous prime is 83140441. The next prime is 83140459. The reversal of 83140445 is 54404138.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54404138 = 2 ⋅27202069.

It can be written as a sum of positive squares in 2 ways, for example, as 37185604 + 45954841 = 6098^2 + 6779^2 .

It is a cyclic number.

It is not a de Polignac number, because 83140445 - 2² = 83140441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83140441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8314040 + ... + 8314049.

It is an arithmetic number, because the mean of its divisors is an integer number (24942135).

Almost surely, 2^83140445 is an apocalyptic number.

It is an amenable number.

83140445 is a deficient number, since it is larger than the sum of its proper divisors (16628095).

83140445 is a wasteful number, since it uses less digits than its factorization.

83140445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16628094.

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 83140445 is about 9118.1382419878. The cubic root of 83140445 is about 436.4529650547.

The spelling of 83140445 in words is "eighty-three million, one hundred forty thousand, four hundred forty-five".