84391907 has 4 divisors (see below), whose sum is σ = 84490560. Its totient is φ = 84293256.

The previous prime is 84391883. The next prime is 84391913. The reversal of 84391907 is 70919348.

It is a happy number.

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 84391907 - 2¹⁶ = 84326371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84391997) 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, 48032 + ... + 49757.

It is an arithmetic number, because the mean of its divisors is an integer number (21122640).

Almost surely, 2^84391907 is an apocalyptic number.

84391907 is a deficient number, since it is larger than the sum of its proper divisors (98653).

84391907 is an equidigital number, since it uses as much as digits as its factorization.

84391907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98652.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 84391907 is about 9186.5067898522. The cubic root of 84391907 is about 438.6319544008.

The spelling of 84391907 in words is "eighty-four million, three hundred ninety-one thousand, nine hundred seven".