819452401 has 2 divisors, whose sum is σ = 819452402. Its totient is φ = 819452400.

The previous prime is 819452371. The next prime is 819452461. The reversal of 819452401 is 104254918.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 819333376 + 119025 = 28624^2 + 345^2 .

It is a cyclic number.

It is not a de Polignac number, because 819452401 - 2¹⁵ = 819419633 is a prime.

It is not a weakly prime, because it can be changed into another prime (819452461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409726200 + 409726201.

It is an arithmetic number, because the mean of its divisors is an integer number (409726201).

Almost surely, 2^819452401 is an apocalyptic number.

It is an amenable number.

819452401 is a deficient number, since it is larger than the sum of its proper divisors (1).

819452401 is an equidigital number, since it uses as much as digits as its factorization.

819452401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 819452401 is about 28626.0790364311. The cubic root of 819452401 is about 935.7817633658.

The spelling of 819452401 in words is "eight hundred nineteen million, four hundred fifty-two thousand, four hundred one".