38961709 has 2 divisors, whose sum is σ = 38961710. Its totient is φ = 38961708.

The previous prime is 38961683. The next prime is 38961721. The reversal of 38961709 is 90716983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38502025 + 459684 = 6205^2 + 678^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38961709 is a prime.

It is a super-3 number, since 3×38961709³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38961409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19480854 + 19480855.

It is an arithmetic number, because the mean of its divisors is an integer number (19480855).

Almost surely, 2^38961709 is an apocalyptic number.

It is an amenable number.

38961709 is a deficient number, since it is larger than the sum of its proper divisors (1).

38961709 is an equidigital number, since it uses as much as digits as its factorization.

38961709 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 38961709 is about 6241.9315119601. The cubic root of 38961709 is about 339.0101225938.

The spelling of 38961709 in words is "thirty-eight million, nine hundred sixty-one thousand, seven hundred nine".