40590709 has 2 divisors, whose sum is σ = 40590710. Its totient is φ = 40590708.

The previous prime is 40590673. The next prime is 40590721. The reversal of 40590709 is 90709504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37271025 + 3319684 = 6105^2 + 1822^2 .

It is a cyclic number.

It is not a de Polignac number, because 40590709 - 2¹⁷ = 40459637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40500709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20295354 + 20295355.

It is an arithmetic number, because the mean of its divisors is an integer number (20295355).

Almost surely, 2^40590709 is an apocalyptic number.

It is an amenable number.

40590709 is a deficient number, since it is larger than the sum of its proper divisors (1).

40590709 is an equidigital number, since it uses as much as digits as its factorization.

40590709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 40590709 is about 6371.0838167458. The cubic root of 40590709 is about 343.6704664923.

The spelling of 40590709 in words is "forty million, five hundred ninety thousand, seven hundred nine".