83290681 has 8 divisors (see below), whose sum is σ = 84831624. Its totient is φ = 81755520.

The previous prime is 83290679. The next prime is 83290687. The reversal of 83290681 is 18609238.

It can be written as a sum of positive squares in 4 ways, for example, as 1478656 + 81812025 = 1216^2 + 9045^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 83290681 - 2¹ = 83290679 is a prime.

It is a super-2 number, since 2×83290681² = 13874675082887522, which contains 22 as substring.

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 83290681.

It is not an unprimeable number, because it can be changed into a prime (83290687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36531 + ... + 38743.

It is an arithmetic number, because the mean of its divisors is an integer number (10603953).

Almost surely, 2^83290681 is an apocalyptic number.

It is an amenable number.

83290681 is a deficient number, since it is larger than the sum of its proper divisors (1540943).

83290681 is a wasteful number, since it uses less digits than its factorization.

83290681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2891.

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

The square root of 83290681 is about 9126.3728282380. The cubic root of 83290681 is about 436.7156991603.

The spelling of 83290681 in words is "eighty-three million, two hundred ninety thousand, six hundred eighty-one".