162921139 has 4 divisors (see below), whose sum is σ = 162948024. Its totient is φ = 162894256.

The previous prime is 162921137. The next prime is 162921169. The reversal of 162921139 is 931129261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 931129261 = 27961 ⋅33301.

It is a cyclic number.

It is not a de Polignac number, because 162921139 - 2¹ = 162921137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (162921131) 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, 399 + ... + 18055.

It is an arithmetic number, because the mean of its divisors is an integer number (40737006).

Almost surely, 2^162921139 is an apocalyptic number.

162921139 is a deficient number, since it is larger than the sum of its proper divisors (26885).

162921139 is an equidigital number, since it uses as much as digits as its factorization.

162921139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26884.

The product of its digits is 5832, while the sum is 34.

The square root of 162921139 is about 12764.0565260422. The cubic root of 162921139 is about 546.1674483171.

The spelling of 162921139 in words is "one hundred sixty-two million, nine hundred twenty-one thousand, one hundred thirty-nine".