40513279 has 2 divisors, whose sum is σ = 40513280. Its totient is φ = 40513278.

The previous prime is 40513273. The next prime is 40513331. The reversal of 40513279 is 97231504.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40513279 - 2⁹ = 40512767 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40513279.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40513273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20256639 + 20256640.

It is an arithmetic number, because the mean of its divisors is an integer number (20256640).

Almost surely, 2^40513279 is an apocalyptic number.

40513279 is a deficient number, since it is larger than the sum of its proper divisors (1).

40513279 is an equidigital number, since it uses as much as digits as its factorization.

40513279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 40513279 is about 6365.0042419467. The cubic root of 40513279 is about 343.4518011596.

The spelling of 40513279 in words is "forty million, five hundred thirteen thousand, two hundred seventy-nine".