84320451 has 12 divisors (see below), whose sum is σ = 123053112. Its totient is φ = 55633536.

The previous prime is 84320443. The next prime is 84320501. The reversal of 84320451 is 15402348.

It is not a de Polignac number, because 84320451 - 2³ = 84320443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84320251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47421 + ... + 49166.

It is an arithmetic number, because the mean of its divisors is an integer number (10254426).

Almost surely, 2^84320451 is an apocalyptic number.

84320451 is a deficient number, since it is larger than the sum of its proper divisors (38732661).

84320451 is a wasteful number, since it uses less digits than its factorization.

84320451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96690 (or 96687 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 84320451 is about 9182.6167839021. The cubic root of 84320451 is about 438.5081205073.

Adding to 84320451 its reverse (15402348), we get a palindrome (99722799).

The spelling of 84320451 in words is "eighty-four million, three hundred twenty thousand, four hundred fifty-one".