39486217 has 2 divisors, whose sum is σ = 39486218. Its totient is φ = 39486216.

The previous prime is 39486203. The next prime is 39486221. The reversal of 39486217 is 71268493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31539456 + 7946761 = 5616^2 + 2819^2 .

It is a cyclic number.

It is not a de Polignac number, because 39486217 - 2²³ = 31097609 is a prime.

It is a super-2 number, since 2×39486217² = 3118322665942178, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 39486217.

It is not a weakly prime, because it can be changed into another prime (39486817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19743108 + 19743109.

It is an arithmetic number, because the mean of its divisors is an integer number (19743109).

Almost surely, 2^39486217 is an apocalyptic number.

It is an amenable number.

39486217 is a deficient number, since it is larger than the sum of its proper divisors (1).

39486217 is an equidigital number, since it uses as much as digits as its factorization.

39486217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 40.

The square root of 39486217 is about 6283.8059327131. The cubic root of 39486217 is about 340.5246139890.

The spelling of 39486217 in words is "thirty-nine million, four hundred eighty-six thousand, two hundred seventeen".