40421089 has 2 divisors, whose sum is σ = 40421090. Its totient is φ = 40421088.

The previous prime is 40421071. The next prime is 40421093. The reversal of 40421089 is 98012404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31270464 + 9150625 = 5592^2 + 3025^2 .

It is a cyclic number.

It is not a de Polignac number, because 40421089 - 2²¹ = 38323937 is a prime.

It is not a weakly prime, because it can be changed into another prime (40421009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20210544 + 20210545.

It is an arithmetic number, because the mean of its divisors is an integer number (20210545).

Almost surely, 2^40421089 is an apocalyptic number.

It is an amenable number.

40421089 is a deficient number, since it is larger than the sum of its proper divisors (1).

40421089 is an equidigital number, since it uses as much as digits as its factorization.

40421089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 40421089 is about 6357.7581740736. The cubic root of 40421089 is about 343.1910893673.

The spelling of 40421089 in words is "forty million, four hundred twenty-one thousand, eighty-nine".