39861097 has 2 divisors, whose sum is σ = 39861098. Its totient is φ = 39861096.

The previous prime is 39861077. The next prime is 39861149. The reversal of 39861097 is 79016893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32592681 + 7268416 = 5709^2 + 2696^2 .

It is an emirp because it is prime and its reverse (79016893) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39861097 - 2⁷ = 39860969 is a prime.

It is not a weakly prime, because it can be changed into another prime (39861007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19930548 + 19930549.

It is an arithmetic number, because the mean of its divisors is an integer number (19930549).

Almost surely, 2^39861097 is an apocalyptic number.

It is an amenable number.

39861097 is a deficient number, since it is larger than the sum of its proper divisors (1).

39861097 is an equidigital number, since it uses as much as digits as its factorization.

39861097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 39861097 is about 6313.5645241021. The cubic root of 39861097 is about 341.5988622407.

The spelling of 39861097 in words is "thirty-nine million, eight hundred sixty-one thousand, ninety-seven".