165371901 has 8 divisors (see below), whose sum is σ = 225873984. Its totient is φ = 107558880.

The previous prime is 165371893. The next prime is 165371933. The reversal of 165371901 is 109173561.

It is a happy number.

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

It is not a de Polignac number, because 165371901 - 2³ = 165371893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165370901) 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, 672121 + ... + 672366.

It is an arithmetic number, because the mean of its divisors is an integer number (28234248).

Almost surely, 2^165371901 is an apocalyptic number.

It is an amenable number.

165371901 is a deficient number, since it is larger than the sum of its proper divisors (60502083).

165371901 is a wasteful number, since it uses less digits than its factorization.

165371901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1344531.

The product of its (nonzero) digits is 5670, while the sum is 33.

The square root of 165371901 is about 12859.7006574803. The cubic root of 165371901 is about 548.8924278536.

The spelling of 165371901 in words is "one hundred sixty-five million, three hundred seventy-one thousand, nine hundred one".