40620289 has 2 divisors, whose sum is σ = 40620290. Its totient is φ = 40620288.

The previous prime is 40620269. The next prime is 40620301. The reversal of 40620289 is 98202604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28944400 + 11675889 = 5380^2 + 3417^2 .

It is a cyclic number.

It is not a de Polignac number, because 40620289 - 2¹³ = 40612097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40620289.

It is not a weakly prime, because it can be changed into another prime (40620269) 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, 20310144 + 20310145.

It is an arithmetic number, because the mean of its divisors is an integer number (20310145).

Almost surely, 2^40620289 is an apocalyptic number.

It is an amenable number.

40620289 is a deficient number, since it is larger than the sum of its proper divisors (1).

40620289 is an equidigital number, since it uses as much as digits as its factorization.

40620289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 40620289 is about 6373.4048200314. The cubic root of 40620289 is about 343.7539281535.

The spelling of 40620289 in words is "forty million, six hundred twenty thousand, two hundred eighty-nine".