165954943 has 8 divisors (see below), whose sum is σ = 206904960. Its totient is φ = 129315480.

The previous prime is 165954941. The next prime is 165954961. The reversal of 165954943 is 349459561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 165954943 - 2¹ = 165954941 is a prime.

It is a super-2 number, since 2×165954943² = 55082086212266498, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165954893 and 165954902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165954941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1077553 + ... + 1077706.

It is an arithmetic number, because the mean of its divisors is an integer number (25863120).

Almost surely, 2^165954943 is an apocalyptic number.

165954943 is a deficient number, since it is larger than the sum of its proper divisors (40950017).

165954943 is a wasteful number, since it uses less digits than its factorization.

165954943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2155277.

The product of its digits is 583200, while the sum is 46.

The square root of 165954943 is about 12882.3500573459. The cubic root of 165954943 is about 549.5367371778.

The spelling of 165954943 in words is "one hundred sixty-five million, nine hundred fifty-four thousand, nine hundred forty-three".