84102077 has 4 divisors (see below), whose sum is σ = 89049276. Its totient is φ = 79154880.

The previous prime is 84102013. The next prime is 84102079. The reversal of 84102077 is 77020148.

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

It can be written as a sum of positive squares in 2 ways, for example, as 51998521 + 32103556 = 7211^2 + 5666^2 .

It is a cyclic number.

It is not a de Polignac number, because 84102077 - 2⁶ = 84102013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84102079) 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, 2473574 + ... + 2473607.

It is an arithmetic number, because the mean of its divisors is an integer number (22262319).

Almost surely, 2^84102077 is an apocalyptic number.

It is an amenable number.

84102077 is a deficient number, since it is larger than the sum of its proper divisors (4947199).

84102077 is a wasteful number, since it uses less digits than its factorization.

84102077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4947198.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 84102077 is about 9170.7184560426. The cubic root of 84102077 is about 438.1292422478.

The spelling of 84102077 in words is "eighty-four million, one hundred two thousand, seventy-seven".