83780081 has 8 divisors (see below), whose sum is σ = 104453184. Its totient is φ = 65283120.

The previous prime is 83780051. The next prime is 83780087. The reversal of 83780081 is 18008738.

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

It is not a de Polignac number, because 83780081 - 2²² = 79585777 is a prime.

It is a super-2 number, since 2×83780081² = 14038203944733122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (83780087) 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, 543950 + ... + 544103.

It is an arithmetic number, because the mean of its divisors is an integer number (13056648).

Almost surely, 2^83780081 is an apocalyptic number.

It is an amenable number.

83780081 is a deficient number, since it is larger than the sum of its proper divisors (20673103).

83780081 is a wasteful number, since it uses less digits than its factorization.

83780081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1088071.

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 83780081 is about 9153.1459619084. The cubic root of 83780081 is about 437.5693817583.

The spelling of 83780081 in words is "eighty-three million, seven hundred eighty thousand, eighty-one".