40378061 has 2 divisors, whose sum is σ = 40378062. Its totient is φ = 40378060.

The previous prime is 40378057. The next prime is 40378067. The reversal of 40378061 is 16087304.

40378061 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., 37589161 + 2788900 = 6131^2 + 1670^2 .

It is a cyclic number.

It is not a de Polignac number, because 40378061 - 2² = 40378057 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40378067) 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, 20189030 + 20189031.

It is an arithmetic number, because the mean of its divisors is an integer number (20189031).

Almost surely, 2^40378061 is an apocalyptic number.

It is an amenable number.

40378061 is a deficient number, since it is larger than the sum of its proper divisors (1).

40378061 is an equidigital number, since it uses as much as digits as its factorization.

40378061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 40378061 is about 6354.3733758727. The cubic root of 40378061 is about 343.0692711994.

The spelling of 40378061 in words is "forty million, three hundred seventy-eight thousand, sixty-one".