403969 has 2 divisors, whose sum is σ = 403970. Its totient is φ = 403968.

The previous prime is 403957. The next prime is 403979. The reversal of 403969 is 969304.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 288369 + 115600 = 537^2 + 340^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-403969 is a prime.

It is a super-2 number, since 2×403969² = 326381905922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 403969.

It is not a weakly prime, because it can be changed into another prime (403979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201984 + 201985.

It is an arithmetic number, because the mean of its divisors is an integer number (201985).

2⁴⁰³⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

403969 is a deficient number, since it is larger than the sum of its proper divisors (1).

403969 is an equidigital number, since it uses as much as digits as its factorization.

403969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 403969 is about 635.5855567900. The cubic root of 403969 is about 73.9235270371.

The spelling of 403969 in words is "four hundred three thousand, nine hundred sixty-nine".