83456421 has 16 divisors (see below), whose sum is σ = 114470400. Its totient is φ = 54054000.

The previous prime is 83456407. The next prime is 83456437. The reversal of 83456421 is 12465438.

It is not a de Polignac number, because 83456421 - 2⁷ = 83456293 is a prime.

It is a super-2 number, since 2×83456421² = 13929948412258482, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83456441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24046 + ... + 27296.

It is an arithmetic number, because the mean of its divisors is an integer number (7154400).

Almost surely, 2^83456421 is an apocalyptic number.

It is an amenable number.

83456421 is a deficient number, since it is larger than the sum of its proper divisors (31013979).

83456421 is a wasteful number, since it uses less digits than its factorization.

83456421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3496.

The product of its digits is 23040, while the sum is 33.

The square root of 83456421 is about 9135.4485932547. The cubic root of 83456421 is about 437.0051805351.

The spelling of 83456421 in words is "eighty-three million, four hundred fifty-six thousand, four hundred twenty-one".