83280961 has 4 divisors (see below), whose sum is σ = 83314372. Its totient is φ = 83247552.

The previous prime is 83280937. The next prime is 83280979. The reversal of 83280961 is 16908238.

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 49280400 + 34000561 = 7020^2 + 5831^2 .

It is a cyclic number.

It is not a de Polignac number, because 83280961 - 2¹⁷ = 83149889 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 83280961.

It is not an unprimeable number, because it can be changed into a prime (83280991) 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, 12636 + ... + 18061.

It is an arithmetic number, because the mean of its divisors is an integer number (20828593).

Almost surely, 2^83280961 is an apocalyptic number.

It is an amenable number.

83280961 is a deficient number, since it is larger than the sum of its proper divisors (33411).

83280961 is a wasteful number, since it uses less digits than its factorization.

83280961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33410.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 83280961 is about 9125.8402900774. The cubic root of 83280961 is about 436.6987102980.

The spelling of 83280961 in words is "eighty-three million, two hundred eighty thousand, nine hundred sixty-one".