82126091 has 4 divisors (see below), whose sum is σ = 82618032. Its totient is φ = 81634152.

The previous prime is 82126073. The next prime is 82126139. The reversal of 82126091 is 19062128.

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

It is a cyclic number.

It is not a de Polignac number, because 82126091 - 2¹⁰ = 82125067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82126391) 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, 245720 + ... + 246053.

It is an arithmetic number, because the mean of its divisors is an integer number (20654508).

Almost surely, 2^82126091 is an apocalyptic number.

82126091 is a deficient number, since it is larger than the sum of its proper divisors (491941).

82126091 is a wasteful number, since it uses less digits than its factorization.

82126091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491940.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 82126091 is about 9062.3446745310. The cubic root of 82126091 is about 434.6707174677.

The spelling of 82126091 in words is "eighty-two million, one hundred twenty-six thousand, ninety-one".