84971157 has 8 divisors (see below), whose sum is σ = 113472576. Its totient is φ = 56558592.

The previous prime is 84971123. The next prime is 84971171. The reversal of 84971157 is 75117948.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 84971157 - 2¹² = 84967061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84971357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19948 + ... + 23829.

It is an arithmetic number, because the mean of its divisors is an integer number (14184072).

Almost surely, 2^84971157 is an apocalyptic number.

It is an amenable number.

84971157 is a deficient number, since it is larger than the sum of its proper divisors (28501419).

84971157 is a wasteful number, since it uses less digits than its factorization.

84971157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44427.

The product of its digits is 70560, while the sum is 42.

The square root of 84971157 is about 9217.9800932742. The cubic root of 84971157 is about 439.6332291353.

The spelling of 84971157 in words is "eighty-four million, nine hundred seventy-one thousand, one hundred fifty-seven".