40273661 has 2 divisors, whose sum is σ = 40273662. Its totient is φ = 40273660.

The previous prime is 40273643. The next prime is 40273669. The reversal of 40273661 is 16637204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23716900 + 16556761 = 4870^2 + 4069^2 .

It is a cyclic number.

It is not a de Polignac number, because 40273661 - 2²² = 36079357 is a prime.

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 (40273669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20136830 + 20136831.

It is an arithmetic number, because the mean of its divisors is an integer number (20136831).

Almost surely, 2^40273661 is an apocalyptic number.

It is an amenable number.

40273661 is a deficient number, since it is larger than the sum of its proper divisors (1).

40273661 is an equidigital number, since it uses as much as digits as its factorization.

40273661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 40273661 is about 6346.1532442890. The cubic root of 40273661 is about 342.7733403235.

The spelling of 40273661 in words is "forty million, two hundred seventy-three thousand, six hundred sixty-one".