84078571 has 2 divisors, whose sum is σ = 84078572. Its totient is φ = 84078570.

The previous prime is 84078559. The next prime is 84078581. The reversal of 84078571 is 17587048.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84078571 - 2⁷ = 84078443 is a prime.

It is a super-2 number, since 2×84078571² = 14138412202804082, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (84078521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42039285 + 42039286.

It is an arithmetic number, because the mean of its divisors is an integer number (42039286).

Almost surely, 2^84078571 is an apocalyptic number.

84078571 is a deficient number, since it is larger than the sum of its proper divisors (1).

84078571 is an equidigital number, since it uses as much as digits as its factorization.

84078571 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62720, while the sum is 40.

The square root of 84078571 is about 9169.4367875023. The cubic root of 84078571 is about 438.0884203246.

The spelling of 84078571 in words is "eighty-four million, seventy-eight thousand, five hundred seventy-one".