40068157 has 2 divisors, whose sum is σ = 40068158. Its totient is φ = 40068156.

The previous prime is 40068121. The next prime is 40068173. The reversal of 40068157 is 75186004.

40068157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35354916 + 4713241 = 5946^2 + 2171^2 .

It is a cyclic number.

It is not a de Polignac number, because 40068157 - 2¹⁵ = 40035389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40068187) 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, 20034078 + 20034079.

It is an arithmetic number, because the mean of its divisors is an integer number (20034079).

Almost surely, 2^40068157 is an apocalyptic number.

It is an amenable number.

40068157 is a deficient number, since it is larger than the sum of its proper divisors (1).

40068157 is an equidigital number, since it uses as much as digits as its factorization.

40068157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 40068157 is about 6329.9413109444. The cubic root of 40068157 is about 342.1893238312.

The spelling of 40068157 in words is "forty million, sixty-eight thousand, one hundred fifty-seven".