40023149 has 2 divisors, whose sum is σ = 40023150. Its totient is φ = 40023148.

The previous prime is 40023143. The next prime is 40023157. The reversal of 40023149 is 94132004.

40023149 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., 25908100 + 14115049 = 5090^2 + 3757^2 .

It is a cyclic number.

It is not a de Polignac number, because 40023149 - 2⁴ = 40023133 is a prime.

It is a super-3 number, since 3×40023149³ (a number of 24 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40023143) 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, 20011574 + 20011575.

It is an arithmetic number, because the mean of its divisors is an integer number (20011575).

Almost surely, 2^40023149 is an apocalyptic number.

It is an amenable number.

40023149 is a deficient number, since it is larger than the sum of its proper divisors (1).

40023149 is an equidigital number, since it uses as much as digits as its factorization.

40023149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 40023149 is about 6326.3851447726. The cubic root of 40023149 is about 342.0611503345.

The spelling of 40023149 in words is "forty million, twenty-three thousand, one hundred forty-nine".