40280897 has 2 divisors, whose sum is σ = 40280898. Its totient is φ = 40280896.

The previous prime is 40280881. The next prime is 40280951. The reversal of 40280897 is 79808204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37834801 + 2446096 = 6151^2 + 1564^2 .

It is a cyclic number.

It is not a de Polignac number, because 40280897 - 2⁴ = 40280881 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40280897.

It is not a weakly prime, because it can be changed into another prime (40280857) 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, 20140448 + 20140449.

It is an arithmetic number, because the mean of its divisors is an integer number (20140449).

Almost surely, 2^40280897 is an apocalyptic number.

It is an amenable number.

40280897 is a deficient number, since it is larger than the sum of its proper divisors (1).

40280897 is an equidigital number, since it uses as much as digits as its factorization.

40280897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 40280897 is about 6346.7233278283. The cubic root of 40280897 is about 342.7938678784.

The spelling of 40280897 in words is "forty million, two hundred eighty thousand, eight hundred ninety-seven".