40375729 has 2 divisors, whose sum is σ = 40375730. Its totient is φ = 40375728.

The previous prime is 40375721. The next prime is 40375807. The reversal of 40375729 is 92757304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39087504 + 1288225 = 6252^2 + 1135^2 .

It is a cyclic number.

It is not a de Polignac number, because 40375729 - 2³ = 40375721 is a prime.

It is not a weakly prime, because it can be changed into another prime (40375721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20187864 + 20187865.

It is an arithmetic number, because the mean of its divisors is an integer number (20187865).

Almost surely, 2^40375729 is an apocalyptic number.

It is an amenable number.

40375729 is a deficient number, since it is larger than the sum of its proper divisors (1).

40375729 is an equidigital number, since it uses as much as digits as its factorization.

40375729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 40375729 is about 6354.1898775532. The cubic root of 40375729 is about 343.0626665159.

It can be divided in two parts, 40 and 375729, that added together give a square (375769 = 613²).

The spelling of 40375729 in words is "forty million, three hundred seventy-five thousand, seven hundred twenty-nine".