82491901 has 4 divisors (see below), whose sum is σ = 86833600. Its totient is φ = 78150204.

The previous prime is 82491889. The next prime is 82491917. The reversal of 82491901 is 10919428.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82491901 is a prime.

It is a super-3 number, since 3×82491901³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82491991) 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, 2170821 + ... + 2170858.

It is an arithmetic number, because the mean of its divisors is an integer number (21708400).

Almost surely, 2^82491901 is an apocalyptic number.

It is an amenable number.

82491901 is a deficient number, since it is larger than the sum of its proper divisors (4341699).

82491901 is a wasteful number, since it uses less digits than its factorization.

82491901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4341698.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 82491901 is about 9082.5052160734. The cubic root of 82491901 is about 435.3151387079.

The spelling of 82491901 in words is "eighty-two million, four hundred ninety-one thousand, nine hundred one".