84099951 has 20 divisors (see below), whose sum is σ = 135296392. Its totient is φ = 51753168.

The previous prime is 84099949. The next prime is 84099989. The reversal of 84099951 is 15999048.

It is not a de Polignac number, because 84099951 - 2¹ = 84099949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 84099897 and 84099906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84099991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 38881 + ... + 40986.

Almost surely, 2^84099951 is an apocalyptic number.

84099951 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

84099951 is a deficient number, since it is larger than the sum of its proper divisors (51196441).

84099951 is a wasteful number, since it uses less digits than its factorization.

84099951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79892 (or 79883 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 84099951 is about 9170.6025429085. The cubic root of 84099951 is about 438.1255504221.

The spelling of 84099951 in words is "eighty-four million, ninety-nine thousand, nine hundred fifty-one".