84851491 has 2 divisors, whose sum is σ = 84851492. Its totient is φ = 84851490.

The previous prime is 84851489. The next prime is 84851527. The reversal of 84851491 is 19415848.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84851491 - 2¹ = 84851489 is a prime.

Together with 84851489, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (84851791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42425745 + 42425746.

It is an arithmetic number, because the mean of its divisors is an integer number (42425746).

Almost surely, 2^84851491 is an apocalyptic number.

84851491 is a deficient number, since it is larger than the sum of its proper divisors (1).

84851491 is an equidigital number, since it uses as much as digits as its factorization.

84851491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46080, while the sum is 40.

The square root of 84851491 is about 9211.4869049465. The cubic root of 84851491 is about 439.4267517536.

The spelling of 84851491 in words is "eighty-four million, eight hundred fifty-one thousand, four hundred ninety-one".