40861879 has 2 divisors, whose sum is σ = 40861880. Its totient is φ = 40861878.

The previous prime is 40861867. The next prime is 40861883. The reversal of 40861879 is 97816804.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40861879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40861859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20430939 + 20430940.

It is an arithmetic number, because the mean of its divisors is an integer number (20430940).

Almost surely, 2^40861879 is an apocalyptic number.

40861879 is a deficient number, since it is larger than the sum of its proper divisors (1).

40861879 is an equidigital number, since it uses as much as digits as its factorization.

40861879 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 40861879 is about 6392.3297005083. The cubic root of 40861879 is about 344.4340760397.

The spelling of 40861879 in words is "forty million, eight hundred sixty-one thousand, eight hundred seventy-nine".