40921469 has 2 divisors, whose sum is σ = 40921470. Its totient is φ = 40921468.

The previous prime is 40921451. The next prime is 40921483. The reversal of 40921469 is 96412904.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40576900 + 344569 = 6370^2 + 587^2 .

It is a cyclic number.

It is not a de Polignac number, because 40921469 - 2¹⁶ = 40855933 is a prime.

It is a super-2 number, since 2×40921469² = 3349133250235922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen 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 (40921429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20460734 + 20460735.

It is an arithmetic number, because the mean of its divisors is an integer number (20460735).

Almost surely, 2^40921469 is an apocalyptic number.

It is an amenable number.

40921469 is a deficient number, since it is larger than the sum of its proper divisors (1).

40921469 is an equidigital number, since it uses as much as digits as its factorization.

40921469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 40921469 is about 6396.9890573613. The cubic root of 40921469 is about 344.6014272716.

The spelling of 40921469 in words is "forty million, nine hundred twenty-one thousand, four hundred sixty-nine".