40803989 has 2 divisors, whose sum is σ = 40803990. Its totient is φ = 40803988.

The previous prime is 40803977. The next prime is 40803991. The reversal of 40803989 is 98930804.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26112100 + 14691889 = 5110^2 + 3833^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40803989 is a prime.

Together with 40803991, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40803929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20401994 + 20401995.

It is an arithmetic number, because the mean of its divisors is an integer number (20401995).

Almost surely, 2^40803989 is an apocalyptic number.

It is an amenable number.

40803989 is a deficient number, since it is larger than the sum of its proper divisors (1).

40803989 is an equidigital number, since it uses as much as digits as its factorization.

40803989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 40803989 is about 6387.8000125239. The cubic root of 40803989 is about 344.2713431721.

The spelling of 40803989 in words is "forty million, eight hundred three thousand, nine hundred eighty-nine".