403523261 has 2 divisors, whose sum is σ = 403523262. Its totient is φ = 403523260.

The previous prime is 403523257. The next prime is 403523279. The reversal of 403523261 is 162325304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 259403236 + 144120025 = 16106^2 + 12005^2 .

It is a cyclic number.

It is not a de Polignac number, because 403523261 - 2² = 403523257 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 403523261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (403523761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201761630 + 201761631.

It is an arithmetic number, because the mean of its divisors is an integer number (201761631).

Almost surely, 2^403523261 is an apocalyptic number.

It is an amenable number.

403523261 is a deficient number, since it is larger than the sum of its proper divisors (1).

403523261 is an equidigital number, since it uses as much as digits as its factorization.

403523261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 403523261 is about 20087.8884156598. Note that the first 3 decimals coincide. The cubic root of 403523261 is about 738.9632798169.

Adding to 403523261 its reverse (162325304), we get a palindrome (565848565).

The spelling of 403523261 in words is "four hundred three million, five hundred twenty-three thousand, two hundred sixty-one".