40238579 has 2 divisors, whose sum is σ = 40238580. Its totient is φ = 40238578.

The previous prime is 40238567. The next prime is 40238581. The reversal of 40238579 is 97583204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40238579 - 2⁸ = 40238323 is a prime.

It is a super-3 number, since 3×40238579³ (a number of 24 digits) contains 333 as substring.

Together with 40238581, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40238479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20119289 + 20119290.

It is an arithmetic number, because the mean of its divisors is an integer number (20119290).

Almost surely, 2^40238579 is an apocalyptic number.

40238579 is a deficient number, since it is larger than the sum of its proper divisors (1).

40238579 is an equidigital number, since it uses as much as digits as its factorization.

40238579 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 40238579 is about 6343.3886054695. The cubic root of 40238579 is about 342.6737825531.

The spelling of 40238579 in words is "forty million, two hundred thirty-eight thousand, five hundred seventy-nine".