40254979 has 2 divisors, whose sum is σ = 40254980. Its totient is φ = 40254978.

The previous prime is 40254971. The next prime is 40255021. The reversal of 40254979 is 97945204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40254979 - 2³ = 40254971 is a prime.

It is not a weakly prime, because it can be changed into another prime (40254971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20127489 + 20127490.

It is an arithmetic number, because the mean of its divisors is an integer number (20127490).

Almost surely, 2^40254979 is an apocalyptic number.

40254979 is a deficient number, since it is larger than the sum of its proper divisors (1).

40254979 is an equidigital number, since it uses as much as digits as its factorization.

40254979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 40254979 is about 6344.6811582616. The cubic root of 40254979 is about 342.7203306408.

The spelling of 40254979 in words is "forty million, two hundred fifty-four thousand, nine hundred seventy-nine".