1468019821 has 2 divisors, whose sum is σ = 1468019822. Its totient is φ = 1468019820.

The previous prime is 1468019803. The next prime is 1468019869. The reversal of 1468019821 is 1289108641.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1099917225 + 368102596 = 33165^2 + 19186^2 .

It is a cyclic number.

It is not a de Polignac number, because 1468019821 - 2⁵ = 1468019789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1468019221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 734009910 + 734009911.

It is an arithmetic number, because the mean of its divisors is an integer number (734009911).

Almost surely, 2^1468019821 is an apocalyptic number.

It is an amenable number.

1468019821 is a deficient number, since it is larger than the sum of its proper divisors (1).

1468019821 is an equidigital number, since it uses as much as digits as its factorization.

1468019821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 40.

The square root of 1468019821 is about 38314.7467824074. The cubic root of 1468019821 is about 1136.5205856918.

The spelling of 1468019821 in words is "one billion, four hundred sixty-eight million, nineteen thousand, eight hundred twenty-one".