162987865 has 4 divisors (see below), whose sum is σ = 195585444. Its totient is φ = 130390288.

The previous prime is 162987827. The next prime is 162987883. The reversal of 162987865 is 568789261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 568789261 = 22651 ⋅25111.

It can be written as a sum of positive squares in 2 ways, for example, as 109244304 + 53743561 = 10452^2 + 7331^2 .

It is a cyclic number.

It is not a de Polignac number, because 162987865 - 2¹³ = 162979673 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16298782 + ... + 16298791.

It is an arithmetic number, because the mean of its divisors is an integer number (48896361).

Almost surely, 2^162987865 is an apocalyptic number.

It is an amenable number.

162987865 is a deficient number, since it is larger than the sum of its proper divisors (32597579).

162987865 is an equidigital number, since it uses as much as digits as its factorization.

162987865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32597578.

The product of its digits is 1451520, while the sum is 52.

The square root of 162987865 is about 12766.6700826801. The cubic root of 162987865 is about 546.2420009406.

The spelling of 162987865 in words is "one hundred sixty-two million, nine hundred eighty-seven thousand, eight hundred sixty-five".