40120320439 has 2 divisors, whose sum is σ = 40120320440. Its totient is φ = 40120320438.

The previous prime is 40120320397. The next prime is 40120320469. The reversal of 40120320439 is 93402302104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40120320439 - 2¹⁹ = 40119796151 is a prime.

It is a super-2 number, since 2×40120320439² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40120320469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20060160219 + 20060160220.

It is an arithmetic number, because the mean of its divisors is an integer number (20060160220).

Almost surely, 2^40120320439 is an apocalyptic number.

40120320439 is a deficient number, since it is larger than the sum of its proper divisors (1).

40120320439 is an equidigital number, since it uses as much as digits as its factorization.

40120320439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 28.

The spelling of 40120320439 in words is "forty billion, one hundred twenty million, three hundred twenty thousand, four hundred thirty-nine".