84345917 has 4 divisors (see below), whose sum is σ = 84365280. Its totient is φ = 84326556.

The previous prime is 84345913. The next prime is 84345931. The reversal of 84345917 is 71954348.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 84345917 - 2² = 84345913 is a prime.

It is a super-2 number, since 2×84345917² = 14228467429141778, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84345913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248 + ... + 12990.

It is an arithmetic number, because the mean of its divisors is an integer number (21091320).

Almost surely, 2^84345917 is an apocalyptic number.

It is an amenable number.

84345917 is a deficient number, since it is larger than the sum of its proper divisors (19363).

84345917 is a wasteful number, since it uses less digits than its factorization.

84345917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19362.

The product of its digits is 120960, while the sum is 41.

The square root of 84345917 is about 9184.0033209924. The cubic root of 84345917 is about 438.5522613361.

The spelling of 84345917 in words is "eighty-four million, three hundred forty-five thousand, nine hundred seventeen".