84350721 has 32 divisors (see below), whose sum is σ = 142901248. Its totient is φ = 43053120.

The previous prime is 84350711. The next prime is 84350731. The reversal of 84350721 is 12705348.

It is an interprime number because it is at equal distance from previous prime (84350711) and next prime (84350731).

It is not a de Polignac number, because 84350721 - 2⁵ = 84350689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84350701) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3480 + ... + 13446.

It is an arithmetic number, because the mean of its divisors is an integer number (4465664).

Almost surely, 2^84350721 is an apocalyptic number.

It is an amenable number.

84350721 is a deficient number, since it is larger than the sum of its proper divisors (58550527).

84350721 is a wasteful number, since it uses less digits than its factorization.

84350721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10021.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 84350721 is about 9184.2648589857. The cubic root of 84350721 is about 438.5605872285.

The spelling of 84350721 in words is "eighty-four million, three hundred fifty thousand, seven hundred twenty-one".