1468632821 has 2 divisors, whose sum is σ = 1468632822. Its totient is φ = 1468632820.

The previous prime is 1468632817. The next prime is 1468632881. The reversal of 1468632821 is 1282368641.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1423930225 + 44702596 = 37735^2 + 6686^2 .

It is an emirp because it is prime and its reverse (1282368641) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1468632821 - 2² = 1468632817 is a prime.

It is a super-3 number, since 3×1468632821³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1468632881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 734316410 + 734316411.

It is an arithmetic number, because the mean of its divisors is an integer number (734316411).

Almost surely, 2^1468632821 is an apocalyptic number.

It is an amenable number.

1468632821 is a deficient number, since it is larger than the sum of its proper divisors (1).

1468632821 is an equidigital number, since it uses as much as digits as its factorization.

1468632821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 110592, while the sum is 41.

The square root of 1468632821 is about 38322.7454783709. The cubic root of 1468632821 is about 1136.6787557110.

The spelling of 1468632821 in words is "one billion, four hundred sixty-eight million, six hundred thirty-two thousand, eight hundred twenty-one".