165206947 has 4 divisors (see below), whose sum is σ = 165321640. Its totient is φ = 165092256.

The previous prime is 165206941. The next prime is 165206959. The reversal of 165206947 is 749602561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 749602561 = 1451 ⋅516611.

It is a cyclic number.

It is not a de Polignac number, because 165206947 - 2⁷ = 165206819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165206941) 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, 55158 + ... + 58075.

It is an arithmetic number, because the mean of its divisors is an integer number (41330410).

Almost surely, 2^165206947 is an apocalyptic number.

165206947 is a deficient number, since it is larger than the sum of its proper divisors (114693).

165206947 is a wasteful number, since it uses less digits than its factorization.

165206947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114692.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 165206947 is about 12853.2854554779. The cubic root of 165206947 is about 548.7098653544.

The spelling of 165206947 in words is "one hundred sixty-five million, two hundred six thousand, nine hundred forty-seven".