84623391 has 6 divisors (see below), whose sum is σ = 122233800. Its totient is φ = 56415588.

The previous prime is 84623389. The next prime is 84623423. The reversal of 84623391 is 19332648.

It is not a de Polignac number, because 84623391 - 2¹ = 84623389 is a prime.

It is a super-2 number, since 2×84623391² = 14322236608677762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84624391) 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 5 ways as a sum of consecutive naturals, for example, 4701291 + ... + 4701308.

It is an arithmetic number, because the mean of its divisors is an integer number (20372300).

Almost surely, 2^84623391 is an apocalyptic number.

84623391 is a deficient number, since it is larger than the sum of its proper divisors (37610409).

84623391 is a wasteful number, since it uses less digits than its factorization.

84623391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9402605 (or 9402602 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 84623391 is about 9199.0972926695. The cubic root of 84623391 is about 439.0326388873.

The spelling of 84623391 in words is "eighty-four million, six hundred twenty-three thousand, three hundred ninety-one".