84721707 has 24 divisors (see below), whose sum is σ = 145040896. Its totient is φ = 48411432.

The previous prime is 84721697. The next prime is 84721783. The reversal of 84721707 is 70712748.

It is not a de Polignac number, because 84721707 - 2⁷ = 84721579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84721207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23203 + ... + 26604.

Almost surely, 2^84721707 is an apocalyptic number.

84721707 is a deficient number, since it is larger than the sum of its proper divisors (60319189).

84721707 is an equidigital number, since it uses as much as digits as its factorization.

84721707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49829 (or 49817 counting only the distinct ones).

The product of its (nonzero) digits is 21952, while the sum is 36.

The square root of 84721707 is about 9204.4395266632. The cubic root of 84721707 is about 439.2025967328.

The spelling of 84721707 in words is "eighty-four million, seven hundred twenty-one thousand, seven hundred seven".