84856091 has 2 divisors, whose sum is σ = 84856092. Its totient is φ = 84856090.

The previous prime is 84856087. The next prime is 84856141. The reversal of 84856091 is 19065848.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84856091 - 2² = 84856087 is a prime.

It is not a weakly prime, because it can be changed into another prime (84850091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42428045 + 42428046.

It is an arithmetic number, because the mean of its divisors is an integer number (42428046).

Almost surely, 2^84856091 is an apocalyptic number.

84856091 is a deficient number, since it is larger than the sum of its proper divisors (1).

84856091 is an equidigital number, since it uses as much as digits as its factorization.

84856091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 84856091 is about 9211.7365898076. The cubic root of 84856091 is about 439.4346923979.

The spelling of 84856091 in words is "eighty-four million, eight hundred fifty-six thousand, ninety-one".