403385989 has 2 divisors, whose sum is σ = 403385990. Its totient is φ = 403385988.

The previous prime is 403385977. The next prime is 403385993. The reversal of 403385989 is 989583304.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 260176900 + 143209089 = 16130^2 + 11967^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-403385989 is a prime.

It is a super-2 number, since 2×403385989² = 325440512243016242, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (403385999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201692994 + 201692995.

It is an arithmetic number, because the mean of its divisors is an integer number (201692995).

Almost surely, 2^403385989 is an apocalyptic number.

It is an amenable number.

403385989 is a deficient number, since it is larger than the sum of its proper divisors (1).

403385989 is an equidigital number, since it uses as much as digits as its factorization.

403385989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 933120, while the sum is 49.

The square root of 403385989 is about 20084.4713398187. The cubic root of 403385989 is about 738.8794759144.

The spelling of 403385989 in words is "four hundred three million, three hundred eighty-five thousand, nine hundred eighty-nine".