40034389 has 2 divisors, whose sum is σ = 40034390. Its totient is φ = 40034388.

The previous prime is 40034381. The next prime is 40034399. The reversal of 40034389 is 98343004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25150225 + 14884164 = 5015^2 + 3858^2 .

It is a cyclic number.

It is not a de Polignac number, because 40034389 - 2³ = 40034381 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40034389.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40034381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20017194 + 20017195.

It is an arithmetic number, because the mean of its divisors is an integer number (20017195).

Almost surely, 2^40034389 is an apocalyptic number.

It is an amenable number.

40034389 is a deficient number, since it is larger than the sum of its proper divisors (1).

40034389 is an equidigital number, since it uses as much as digits as its factorization.

40034389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 40034389 is about 6327.2734254179. The cubic root of 40034389 is about 342.0931685337.

The spelling of 40034389 in words is "forty million, thirty-four thousand, three hundred eighty-nine".