39316661 has 2 divisors, whose sum is σ = 39316662. Its totient is φ = 39316660.

The previous prime is 39316621. The next prime is 39316691. The reversal of 39316661 is 16661393.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37576900 + 1739761 = 6130^2 + 1319^2 .

It is a cyclic number.

It is not a de Polignac number, because 39316661 - 2¹⁰ = 39315637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39316601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19658330 + 19658331.

It is an arithmetic number, because the mean of its divisors is an integer number (19658331).

Almost surely, 2^39316661 is an apocalyptic number.

It is an amenable number.

39316661 is a deficient number, since it is larger than the sum of its proper divisors (1).

39316661 is an equidigital number, since it uses as much as digits as its factorization.

39316661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17496, while the sum is 35.

The square root of 39316661 is about 6270.2999130823. The cubic root of 39316661 is about 340.0365041544.

The spelling of 39316661 in words is "thirty-nine million, three hundred sixteen thousand, six hundred sixty-one".