82400077 has 4 divisors (see below), whose sum is σ = 85058176. Its totient is φ = 79741980.

The previous prime is 82400063. The next prime is 82400089. The reversal of 82400077 is 77000428.

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 82400077 - 2⁷ = 82399949 is a prime.

It is a super-3 number, since 3×82400077³ (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 (82400057) 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, 1329003 + ... + 1329064.

It is an arithmetic number, because the mean of its divisors is an integer number (21264544).

Almost surely, 2^82400077 is an apocalyptic number.

It is an amenable number.

82400077 is a deficient number, since it is larger than the sum of its proper divisors (2658099).

82400077 is a wasteful number, since it uses less digits than its factorization.

82400077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2658098.

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 82400077 is about 9077.4488156089. The cubic root of 82400077 is about 435.1535583287.

The spelling of 82400077 in words is "eighty-two million, four hundred thousand, seventy-seven".