40381879 has 2 divisors, whose sum is σ = 40381880. Its totient is φ = 40381878.

The previous prime is 40381849. The next prime is 40381927. The reversal of 40381879 is 97818304.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40381879 - 2⁷ = 40381751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40381819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20190939 + 20190940.

It is an arithmetic number, because the mean of its divisors is an integer number (20190940).

Almost surely, 2^40381879 is an apocalyptic number.

40381879 is a deficient number, since it is larger than the sum of its proper divisors (1).

40381879 is an equidigital number, since it uses as much as digits as its factorization.

40381879 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 40381879 is about 6354.6737917851. The cubic root of 40381879 is about 343.0800839788.

The spelling of 40381879 in words is "forty million, three hundred eighty-one thousand, eight hundred seventy-nine".