40780001 has 2 divisors, whose sum is σ = 40780002. Its totient is φ = 40780000.

The previous prime is 40779967. The next prime is 40780007. The reversal of 40780001 is 10008704.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31629376 + 9150625 = 5624^2 + 3025^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40780001 is a prime.

It is not a weakly prime, because it can be changed into another prime (40780007) 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, 20390000 + 20390001.

It is an arithmetic number, because the mean of its divisors is an integer number (20390001).

Almost surely, 2^40780001 is an apocalyptic number.

It is an amenable number.

40780001 is a deficient number, since it is larger than the sum of its proper divisors (1).

40780001 is an equidigital number, since it uses as much as digits as its factorization.

40780001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 40780001 is about 6385.9220947331. The cubic root of 40780001 is about 344.2038661105.

Adding to 40780001 its reverse (10008704), we get a palindrome (50788705).

It can be divided in two parts, 407 and 80001, that added together give a palindrome (80408).

The spelling of 40780001 in words is "forty million, seven hundred eighty thousand, one".