162013891 has 4 divisors (see below), whose sum is σ = 174476512. Its totient is φ = 149551272.

The previous prime is 162013889. The next prime is 162013903. The reversal of 162013891 is 198310261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 198310261 = 233 ⋅851117.

It is not a de Polignac number, because 162013891 - 2¹ = 162013889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (162013091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6231291 + ... + 6231316.

It is an arithmetic number, because the mean of its divisors is an integer number (43619128).

Almost surely, 2^162013891 is an apocalyptic number.

162013891 is a deficient number, since it is larger than the sum of its proper divisors (12462621).

162013891 is a wasteful number, since it uses less digits than its factorization.

162013891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12462620.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 162013891 is about 12728.4677396771. The cubic root of 162013891 is about 545.1517586526.

The spelling of 162013891 in words is "one hundred sixty-two million, thirteen thousand, eight hundred ninety-one".