84491907 has 4 divisors (see below), whose sum is σ = 112655880. Its totient is φ = 56327936.

The previous prime is 84491867. The next prime is 84491909. The reversal of 84491907 is 70919448.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 84491907 - 2⁷ = 84491779 is a prime.

It is a super-3 number, since 3×84491907³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (84491909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14081982 + ... + 14081987.

It is an arithmetic number, because the mean of its divisors is an integer number (28163970).

Almost surely, 2^84491907 is an apocalyptic number.

84491907 is a deficient number, since it is larger than the sum of its proper divisors (28163973).

84491907 is a wasteful number, since it uses less digits than its factorization.

84491907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28163972.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 84491907 is about 9191.9479437168. The cubic root of 84491907 is about 438.8051379963.

The spelling of 84491907 in words is "eighty-four million, four hundred ninety-one thousand, nine hundred seven".