40381673 has 2 divisors, whose sum is σ = 40381674. Its totient is φ = 40381672.

The previous prime is 40381661. The next prime is 40381723. The reversal of 40381673 is 37618304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33965584 + 6416089 = 5828^2 + 2533^2 .

It is a cyclic number.

It is not a de Polignac number, because 40381673 - 2⁴ = 40381657 is a prime.

It is not a weakly prime, because it can be changed into another prime (40381603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20190836 + 20190837.

It is an arithmetic number, because the mean of its divisors is an integer number (20190837).

Almost surely, 2^40381673 is an apocalyptic number.

It is an amenable number.

40381673 is a deficient number, since it is larger than the sum of its proper divisors (1).

40381673 is an equidigital number, since it uses as much as digits as its factorization.

40381673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 40381673 is about 6354.6575832219. The cubic root of 40381673 is about 343.0795005932.

Adding to 40381673 its reverse (37618304), we get a palindrome (77999977).

The spelling of 40381673 in words is "forty million, three hundred eighty-one thousand, six hundred seventy-three".