40905497 has 2 divisors, whose sum is σ = 40905498. Its totient is φ = 40905496.

The previous prime is 40905493. The next prime is 40905503. The reversal of 40905497 is 79450904.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36192256 + 4713241 = 6016^2 + 2171^2 .

It is a cyclic number.

It is not a de Polignac number, because 40905497 - 2² = 40905493 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40905497.

It is not a weakly prime, because it can be changed into another prime (40905493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20452748 + 20452749.

It is an arithmetic number, because the mean of its divisors is an integer number (20452749).

Almost surely, 2^40905497 is an apocalyptic number.

It is an amenable number.

40905497 is a deficient number, since it is larger than the sum of its proper divisors (1).

40905497 is an equidigital number, since it uses as much as digits as its factorization.

40905497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 40905497 is about 6395.7405357003. The cubic root of 40905497 is about 344.5565878073.

The spelling of 40905497 in words is "forty million, nine hundred five thousand, four hundred ninety-seven".