40055879 has 2 divisors, whose sum is σ = 40055880. Its totient is φ = 40055878.

The previous prime is 40055861. The next prime is 40055909. The reversal of 40055879 is 97855004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40055879 - 2¹⁶ = 39990343 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40055809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20027939 + 20027940.

It is an arithmetic number, because the mean of its divisors is an integer number (20027940).

Almost surely, 2^40055879 is an apocalyptic number.

40055879 is a deficient number, since it is larger than the sum of its proper divisors (1).

40055879 is an equidigital number, since it uses as much as digits as its factorization.

40055879 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 40055879 is about 6328.9714014206. The cubic root of 40055879 is about 342.1543681453.

The spelling of 40055879 in words is "forty million, fifty-five thousand, eight hundred seventy-nine".