403421089 has 2 divisors, whose sum is σ = 403421090. Its totient is φ = 403421088.

The previous prime is 403421087. The next prime is 403421119. The reversal of 403421089 is 980124304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 302760000 + 100661089 = 17400^2 + 10033^2 .

It is a cyclic number.

It is not a de Polignac number, because 403421089 - 2¹ = 403421087 is a prime.

Together with 403421087, it forms a pair of twin primes.

It is equal to p_21508933 and since 403421089 and 21508933 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 403421089.

It is not a weakly prime, because it can be changed into another prime (403421087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201710544 + 201710545.

It is an arithmetic number, because the mean of its divisors is an integer number (201710545).

Almost surely, 2^403421089 is an apocalyptic number.

It is an amenable number.

403421089 is a deficient number, since it is larger than the sum of its proper divisors (1).

403421089 is an equidigital number, since it uses as much as digits as its factorization.

403421089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 403421089 is about 20085.3451302187. The cubic root of 403421089 is about 738.9009061062.

The spelling of 403421089 in words is "four hundred three million, four hundred twenty-one thousand, eighty-nine".