40781959 has 2 divisors, whose sum is σ = 40781960. Its totient is φ = 40781958.

The previous prime is 40781941. The next prime is 40781981. The reversal of 40781959 is 95918704.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40781959 - 2⁵ = 40781927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40781989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20390979 + 20390980.

It is an arithmetic number, because the mean of its divisors is an integer number (20390980).

Almost surely, 2^40781959 is an apocalyptic number.

40781959 is a deficient number, since it is larger than the sum of its proper divisors (1).

40781959 is an equidigital number, since it uses as much as digits as its factorization.

40781959 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 43.

The square root of 40781959 is about 6386.0753988659. The cubic root of 40781959 is about 344.2093748597.

The spelling of 40781959 in words is "forty million, seven hundred eighty-one thousand, nine hundred fifty-nine".