165984847 has 4 divisors (see below), whose sum is σ = 189696976. Its totient is φ = 142272720.

The previous prime is 165984827. The next prime is 165984887. The reversal of 165984847 is 748489561.

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 165984847 - 2²⁷ = 31767119 is a prime.

It is a super-2 number, since 2×165984847² = 55101938867226818, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 165984794 and 165984803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165984827) 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, 11856054 + ... + 11856067.

It is an arithmetic number, because the mean of its divisors is an integer number (47424244).

Almost surely, 2^165984847 is an apocalyptic number.

165984847 is a deficient number, since it is larger than the sum of its proper divisors (23712129).

165984847 is an equidigital number, since it uses as much as digits as its factorization.

165984847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23712128.

The product of its digits is 1935360, while the sum is 52.

The square root of 165984847 is about 12883.5106628589. The cubic root of 165984847 is about 549.5697428426.

The spelling of 165984847 in words is "one hundred sixty-five million, nine hundred eighty-four thousand, eight hundred forty-seven".