726561403 has 2 divisors, whose sum is σ = 726561404. Its totient is φ = 726561402.

The previous prime is 726561373. The next prime is 726561461. The reversal of 726561403 is 304165627.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 726561403 - 2²⁹ = 189690491 is a prime.

It is not a weakly prime, because it can be changed into another prime (726565403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363280701 + 363280702.

It is an arithmetic number, because the mean of its divisors is an integer number (363280702).

Almost surely, 2^726561403 is an apocalyptic number.

726561403 is a deficient number, since it is larger than the sum of its proper divisors (1).

726561403 is an equidigital number, since it uses as much as digits as its factorization.

726561403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 726561403 is about 26954.8029671894. The cubic root of 726561403 is about 898.9953410688.

The spelling of 726561403 in words is "seven hundred twenty-six million, five hundred sixty-one thousand, four hundred three".