468158821 has 4 divisors (see below), whose sum is σ = 504171052. Its totient is φ = 432146592.

The previous prime is 468158791. The next prime is 468158827. The reversal of 468158821 is 128851864.

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 163481796 + 304677025 = 12786^2 + 17455^2 .

It is a cyclic number.

It is not a de Polignac number, because 468158821 - 2²¹ = 466061669 is a prime.

It is a super-2 number, since 2×468158821² = 438345363360220082, 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 (468158827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18006096 + ... + 18006121.

It is an arithmetic number, because the mean of its divisors is an integer number (126042763).

Almost surely, 2^468158821 is an apocalyptic number.

It is an amenable number.

468158821 is a deficient number, since it is larger than the sum of its proper divisors (36012231).

468158821 is a wasteful number, since it uses less digits than its factorization.

468158821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36012230.

The product of its digits is 122880, while the sum is 43.

The square root of 468158821 is about 21636.9780930702. The cubic root of 468158821 is about 776.4814236651.

The spelling of 468158821 in words is "four hundred sixty-eight million, one hundred fifty-eight thousand, eight hundred twenty-one".