84157471 has 2 divisors, whose sum is σ = 84157472. Its totient is φ = 84157470.

The previous prime is 84157399. The next prime is 84157487. The reversal of 84157471 is 17475148.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84157471 - 2²⁵ = 50603039 is a prime.

It is a super-3 number, since 3×84157471³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 84157471.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84157571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42078735 + 42078736.

It is an arithmetic number, because the mean of its divisors is an integer number (42078736).

Almost surely, 2^84157471 is an apocalyptic number.

84157471 is a deficient number, since it is larger than the sum of its proper divisors (1).

84157471 is an equidigital number, since it uses as much as digits as its factorization.

84157471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31360, while the sum is 37.

The square root of 84157471 is about 9173.7381148581. The cubic root of 84157471 is about 438.2254127017.

The spelling of 84157471 in words is "eighty-four million, one hundred fifty-seven thousand, four hundred seventy-one".