40291973 has 2 divisors, whose sum is σ = 40291974. Its totient is φ = 40291972.

The previous prime is 40291969. The next prime is 40291981. The reversal of 40291973 is 37919204.

40291973 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38962564 + 1329409 = 6242^2 + 1153^2 .

It is a cyclic number.

It is not a de Polignac number, because 40291973 - 2² = 40291969 is a prime.

It is a nialpdrome in base 7.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40291073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20145986 + 20145987.

It is an arithmetic number, because the mean of its divisors is an integer number (20145987).

Almost surely, 2^40291973 is an apocalyptic number.

It is an amenable number.

40291973 is a deficient number, since it is larger than the sum of its proper divisors (1).

40291973 is an equidigital number, since it uses as much as digits as its factorization.

40291973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 40291973 is about 6347.5958440972. The cubic root of 40291973 is about 342.8252842339.

The spelling of 40291973 in words is "forty million, two hundred ninety-one thousand, nine hundred seventy-three".