162039981 has 8 divisors (see below), whose sum is σ = 218788480. Its totient is φ = 106659072.

The previous prime is 162039979. The next prime is 162039989. The reversal of 162039981 is 189930261.

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

It is not a de Polignac number, because 162039981 - 2¹ = 162039979 is a prime.

It is a super-2 number, since 2×162039981² = 52513910884960722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162039989) 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, 341620 + ... + 342093.

It is an arithmetic number, because the mean of its divisors is an integer number (27348560).

Almost surely, 2^162039981 is an apocalyptic number.

It is an amenable number.

162039981 is a deficient number, since it is larger than the sum of its proper divisors (56748499).

162039981 is an equidigital number, since it uses as much as digits as its factorization.

162039981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683795.

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 162039981 is about 12729.4925664773. The cubic root of 162039981 is about 545.1810200241.

The spelling of 162039981 in words is "one hundred sixty-two million, thirty-nine thousand, nine hundred eighty-one".