39452813 has 2 divisors, whose sum is σ = 39452814. Its totient is φ = 39452812.

The previous prime is 39452779. The next prime is 39452821. The reversal of 39452813 is 31825493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26399044 + 13053769 = 5138^2 + 3613^2 .

It is a cyclic number.

It is not a de Polignac number, because 39452813 - 2¹⁴ = 39436429 is a prime.

It is a super-2 number, since 2×39452813² = 3113048907225938, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39452513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19726406 + 19726407.

It is an arithmetic number, because the mean of its divisors is an integer number (19726407).

Almost surely, 2^39452813 is an apocalyptic number.

It is an amenable number.

39452813 is a deficient number, since it is larger than the sum of its proper divisors (1).

39452813 is an equidigital number, since it uses as much as digits as its factorization.

39452813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 35.

The square root of 39452813 is about 6281.1474270232. The cubic root of 39452813 is about 340.4285628082.

The spelling of 39452813 in words is "thirty-nine million, four hundred fifty-two thousand, eight hundred thirteen".