39801217 has 2 divisors, whose sum is σ = 39801218. Its totient is φ = 39801216.

The previous prime is 39801211. The next prime is 39801221. The reversal of 39801217 is 71210893.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38925121 + 876096 = 6239^2 + 936^2 .

It is a cyclic number.

It is not a de Polignac number, because 39801217 - 2¹⁹ = 39276929 is a prime.

It is not a weakly prime, because it can be changed into another prime (39801211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19900608 + 19900609.

It is an arithmetic number, because the mean of its divisors is an integer number (19900609).

Almost surely, 2^39801217 is an apocalyptic number.

It is an amenable number.

39801217 is a deficient number, since it is larger than the sum of its proper divisors (1).

39801217 is an equidigital number, since it uses as much as digits as its factorization.

39801217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 39801217 is about 6308.8205712320. The cubic root of 39801217 is about 341.4277246943.

The spelling of 39801217 in words is "thirty-nine million, eight hundred one thousand, two hundred seventeen".