1803764401 has 2 divisors, whose sum is σ = 1803764402. Its totient is φ = 1803764400.

The previous prime is 1803764341. The next prime is 1803764407. The reversal of 1803764401 is 1044673081.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1699418176 + 104346225 = 41224^2 + 10215^2 .

It is a cyclic number.

It is not a de Polignac number, because 1803764401 - 2⁹ = 1803763889 is a prime.

It is not a weakly prime, because it can be changed into another prime (1803764407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 901882200 + 901882201.

It is an arithmetic number, because the mean of its divisors is an integer number (901882201).

Almost surely, 2^1803764401 is an apocalyptic number.

It is an amenable number.

1803764401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1803764401 is an equidigital number, since it uses as much as digits as its factorization.

1803764401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 1803764401 is about 42470.7475917248. The cubic root of 1803764401 is about 1217.2878029976.

The spelling of 1803764401 in words is "one billion, eight hundred three million, seven hundred sixty-four thousand, four hundred one".