162870989 has 4 divisors (see below), whose sum is σ = 168487260. Its totient is φ = 157254720.

The previous prime is 162870937. The next prime is 162870991. The reversal of 162870989 is 989078261.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 56100100 + 106770889 = 7490^2 + 10333^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-162870989 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 (162870919) 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, 2808092 + ... + 2808149.

It is an arithmetic number, because the mean of its divisors is an integer number (42121815).

Almost surely, 2^162870989 is an apocalyptic number.

It is an amenable number.

162870989 is a deficient number, since it is larger than the sum of its proper divisors (5616271).

162870989 is an equidigital number, since it uses as much as digits as its factorization.

162870989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5616270.

The product of its (nonzero) digits is 435456, while the sum is 50.

The square root of 162870989 is about 12762.0918739837. The cubic root of 162870989 is about 546.1114025750. Note that the first 3 decimals are identical.

The spelling of 162870989 in words is "one hundred sixty-two million, eight hundred seventy thousand, nine hundred eighty-nine".