84721351 has 16 divisors (see below), whose sum is σ = 103864320. Its totient is φ = 68001120.

The previous prime is 84721333. The next prime is 84721367. The reversal of 84721351 is 15312748.

It is a de Polignac number, because none of the positive numbers 2^k-84721351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84721451) 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, 9591 + ... + 16168.

It is an arithmetic number, because the mean of its divisors is an integer number (6491520).

Almost surely, 2^84721351 is an apocalyptic number.

84721351 is a deficient number, since it is larger than the sum of its proper divisors (19142969).

84721351 is a wasteful number, since it uses less digits than its factorization.

84721351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25806.

The product of its digits is 6720, while the sum is 31.

The square root of 84721351 is about 9204.4201881487. The cubic root of 84721351 is about 439.2019815566.

The spelling of 84721351 in words is "eighty-four million, seven hundred twenty-one thousand, three hundred fifty-one".