403090561 has 2 divisors, whose sum is σ = 403090562. Its totient is φ = 403090560.

The previous prime is 403090511. The next prime is 403090607. The reversal of 403090561 is 165090304.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 401240961 + 1849600 = 20031^2 + 1360^2 .

It is a cyclic number.

It is not a de Polignac number, because 403090561 - 2⁹ = 403090049 is a prime.

It is not a weakly prime, because it can be changed into another prime (403090511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201545280 + 201545281.

It is an arithmetic number, because the mean of its divisors is an integer number (201545281).

Almost surely, 2^403090561 is an apocalyptic number.

It is an amenable number.

403090561 is a deficient number, since it is larger than the sum of its proper divisors (1).

403090561 is an equidigital number, since it uses as much as digits as its factorization.

403090561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 403090561 is about 20077.1153555485. The cubic root of 403090561 is about 738.6990540173.

It can be divided in two parts, 403090 and 561, that added together give a triangular number (403651 = T₈₉₈).

The spelling of 403090561 in words is "four hundred three million, ninety thousand, five hundred sixty-one".