165934474 has 4 divisors (see below), whose sum is σ = 248901714. Its totient is φ = 82967236.

The previous prime is 165934471. The next prime is 165934541. The reversal of 165934474 is 474439561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 474439561 = 23 ⋅20627807.

It can be written as a sum of positive squares in only one way, i.e., 165302449 + 632025 = 12857^2 + 795^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 165934474.

It is not an unprimeable number, because it can be changed into a prime (165934471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41483617 + ... + 41483620.

Almost surely, 2^165934474 is an apocalyptic number.

165934474 is a deficient number, since it is larger than the sum of its proper divisors (82967240).

165934474 is an equidigital number, since it uses as much as digits as its factorization.

165934474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82967239.

The product of its digits is 362880, while the sum is 43.

The square root of 165934474 is about 12881.5555737651. Note that the first 4 decimals coincide. The cubic root of 165934474 is about 549.5141428323.

The spelling of 165934474 in words is "one hundred sixty-five million, nine hundred thirty-four thousand, four hundred seventy-four".