84333721 has 2 divisors, whose sum is σ = 84333722. Its totient is φ = 84333720.

The previous prime is 84333713. The next prime is 84333731. The reversal of 84333721 is 12733348.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68293696 + 16040025 = 8264^2 + 4005^2 .

It is a cyclic number.

It is not a de Polignac number, because 84333721 - 2³ = 84333713 is a prime.

It is a super-2 number, since 2×84333721² = 14224352995411682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (84333701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42166860 + 42166861.

It is an arithmetic number, because the mean of its divisors is an integer number (42166861).

Almost surely, 2^84333721 is an apocalyptic number.

It is an amenable number.

84333721 is a deficient number, since it is larger than the sum of its proper divisors (1).

84333721 is an equidigital number, since it uses as much as digits as its factorization.

84333721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 31.

The square root of 84333721 is about 9183.3393163925. The cubic root of 84333721 is about 438.5311228255.

The spelling of 84333721 in words is "eighty-four million, three hundred thirty-three thousand, seven hundred twenty-one".