40439453 has 2 divisors, whose sum is σ = 40439454. Its totient is φ = 40439452.

The previous prime is 40439431. The next prime is 40439471. The reversal of 40439453 is 35493404.

40439453 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39413284 + 1026169 = 6278^2 + 1013^2 .

It is a cyclic number.

It is not a de Polignac number, because 40439453 - 2²⁰ = 39390877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40439953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20219726 + 20219727.

It is an arithmetic number, because the mean of its divisors is an integer number (20219727).

Almost surely, 2^40439453 is an apocalyptic number.

It is an amenable number.

40439453 is a deficient number, since it is larger than the sum of its proper divisors (1).

40439453 is an equidigital number, since it uses as much as digits as its factorization.

40439453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 40439453 is about 6359.2022298398. The cubic root of 40439453 is about 343.2430540483.

The spelling of 40439453 in words is "forty million, four hundred thirty-nine thousand, four hundred fifty-three".