82769681 has 4 divisors (see below), whose sum is σ = 87126000. Its totient is φ = 78413364.

The previous prime is 82769657. The next prime is 82769689. The reversal of 82769681 is 18696728.

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 82769681 - 2¹⁰ = 82768657 is a prime.

It is a super-2 number, since 2×82769681² = 13701640185683522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82769689) 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, 2178131 + ... + 2178168.

It is an arithmetic number, because the mean of its divisors is an integer number (21781500).

Almost surely, 2^82769681 is an apocalyptic number.

It is an amenable number.

82769681 is a deficient number, since it is larger than the sum of its proper divisors (4356319).

82769681 is a wasteful number, since it uses less digits than its factorization.

82769681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4356318.

The product of its digits is 290304, while the sum is 47.

The square root of 82769681 is about 9097.7844006110. The cubic root of 82769681 is about 435.8032123327.

The spelling of 82769681 in words is "eighty-two million, seven hundred sixty-nine thousand, six hundred eighty-one".