83790145 has 4 divisors (see below), whose sum is σ = 100548180. Its totient is φ = 67032112.

The previous prime is 83790121. The next prime is 83790169. The reversal of 83790145 is 54109738.

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

It is an interprime number because it is at equal distance from previous prime (83790121) and next prime (83790169).

It can be written as a sum of positive squares in 2 ways, for example, as 64112049 + 19678096 = 8007^2 + 4436^2 .

It is a cyclic number.

It is not a de Polignac number, because 83790145 - 2⁷ = 83790017 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8379010 + ... + 8379019.

It is an arithmetic number, because the mean of its divisors is an integer number (25137045).

Almost surely, 2^83790145 is an apocalyptic number.

It is an amenable number.

83790145 is a deficient number, since it is larger than the sum of its proper divisors (16758035).

83790145 is a wasteful number, since it uses less digits than its factorization.

83790145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16758034.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 83790145 is about 9153.6957017371. The cubic root of 83790145 is about 437.5869019209.

The spelling of 83790145 in words is "eighty-three million, seven hundred ninety thousand, one hundred forty-five".