162081997 has 8 divisors (see below), whose sum is σ = 202076352. Its totient is φ = 126297600.

The previous prime is 162081967. The next prime is 162082001. The reversal of 162081997 is 799180261.

162081997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 162081997 - 2⁷ = 162081869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162081937) 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, 1052404 + ... + 1052557.

It is an arithmetic number, because the mean of its divisors is an integer number (25259544).

Almost surely, 2^162081997 is an apocalyptic number.

It is an amenable number.

162081997 is a deficient number, since it is larger than the sum of its proper divisors (39994355).

162081997 is a wasteful number, since it uses less digits than its factorization.

162081997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2104979.

The product of its (nonzero) digits is 54432, while the sum is 43.

The square root of 162081997 is about 12731.1428002360. The cubic root of 162081997 is about 545.2281366802.

The spelling of 162081997 in words is "one hundred sixty-two million, eighty-one thousand, nine hundred ninety-seven".