83426781 has 8 divisors (see below), whose sum is σ = 111557664. Its totient is φ = 55456880.

The previous prime is 83426779. The next prime is 83426789. The reversal of 83426781 is 18762438.

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 83426781 - 2¹ = 83426779 is a prime.

It is a super-2 number, since 2×83426781² = 13920055576043922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83426789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39030 + ... + 41111.

It is an arithmetic number, because the mean of its divisors is an integer number (13944708).

Almost surely, 2^83426781 is an apocalyptic number.

It is an amenable number.

83426781 is a deficient number, since it is larger than the sum of its proper divisors (28130883).

83426781 is a wasteful number, since it uses less digits than its factorization.

83426781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80491.

The product of its digits is 64512, while the sum is 39.

The square root of 83426781 is about 9133.8261971640. The cubic root of 83426781 is about 436.9534394902.

The spelling of 83426781 in words is "eighty-three million, four hundred twenty-six thousand, seven hundred eighty-one".