84591877 has 2 divisors, whose sum is σ = 84591878. Its totient is φ = 84591876.

The previous prime is 84591853. The next prime is 84591893. The reversal of 84591877 is 77819548.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56565441 + 28026436 = 7521^2 + 5294^2 .

It is a cyclic number.

It is not a de Polignac number, because 84591877 - 2¹¹ = 84589829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84591877.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84591817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42295938 + 42295939.

It is an arithmetic number, because the mean of its divisors is an integer number (42295939).

Almost surely, 2^84591877 is an apocalyptic number.

It is an amenable number.

84591877 is a deficient number, since it is larger than the sum of its proper divisors (1).

84591877 is an equidigital number, since it uses as much as digits as its factorization.

84591877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 564480, while the sum is 49.

The square root of 84591877 is about 9197.3842477087. The cubic root of 84591877 is about 438.9781331048.

The spelling of 84591877 in words is "eighty-four million, five hundred ninety-one thousand, eight hundred seventy-seven".