403966261 has 2 divisors, whose sum is σ = 403966262. Its totient is φ = 403966260.

The previous prime is 403966243. The next prime is 403966279. The reversal of 403966261 is 162669304.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (403966243) and next prime (403966279).

It can be written as a sum of positive squares in only one way, i.e., 306075025 + 97891236 = 17495^2 + 9894^2 .

It is a cyclic number.

It is not a de Polignac number, because 403966261 - 2¹⁵ = 403933493 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 403966261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (403966861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201983130 + 201983131.

It is an arithmetic number, because the mean of its divisors is an integer number (201983131).

Almost surely, 2^403966261 is an apocalyptic number.

It is an amenable number.

403966261 is a deficient number, since it is larger than the sum of its proper divisors (1).

403966261 is an equidigital number, since it uses as much as digits as its factorization.

403966261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 403966261 is about 20098.9119357243. The cubic root of 403966261 is about 739.2335996408.

The spelling of 403966261 in words is "four hundred three million, nine hundred sixty-six thousand, two hundred sixty-one".