82261597 has 4 divisors (see below), whose sum is σ = 89739936. Its totient is φ = 74783260.

The previous prime is 82261573. The next prime is 82261637. The reversal of 82261597 is 79516228.

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 not a de Polignac number, because 82261597 - 2¹⁵ = 82228829 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82261567) 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, 3739153 + ... + 3739174.

It is an arithmetic number, because the mean of its divisors is an integer number (22434984).

Almost surely, 2^82261597 is an apocalyptic number.

It is an amenable number.

82261597 is a deficient number, since it is larger than the sum of its proper divisors (7478339).

82261597 is a wasteful number, since it uses less digits than its factorization.

82261597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7478338.

The product of its digits is 60480, while the sum is 40.

The square root of 82261597 is about 9069.8179143795. The cubic root of 82261597 is about 434.9096513818.

The spelling of 82261597 in words is "eighty-two million, two hundred sixty-one thousand, five hundred ninety-seven".