40298813 has 2 divisors, whose sum is σ = 40298814. Its totient is φ = 40298812.

The previous prime is 40298801. The next prime is 40298821. The reversal of 40298813 is 31889204.

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., 27646564 + 12652249 = 5258^2 + 3557^2 .

It is a cyclic number.

It is not a de Polignac number, because 40298813 - 2¹⁸ = 40036669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40298873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20149406 + 20149407.

It is an arithmetic number, because the mean of its divisors is an integer number (20149407).

Almost surely, 2^40298813 is an apocalyptic number.

It is an amenable number.

40298813 is a deficient number, since it is larger than the sum of its proper divisors (1).

40298813 is an equidigital number, since it uses as much as digits as its factorization.

40298813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 40298813 is about 6348.1346078986. The cubic root of 40298813 is about 342.8446825746.

The spelling of 40298813 in words is "forty million, two hundred ninety-eight thousand, eight hundred thirteen".