39668957 has 2 divisors, whose sum is σ = 39668958. Its totient is φ = 39668956.

The previous prime is 39668953. The next prime is 39668999. The reversal of 39668957 is 75986693.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34351321 + 5317636 = 5861^2 + 2306^2 .

It is a cyclic number.

It is not a de Polignac number, because 39668957 - 2² = 39668953 is a prime.

It is a super-2 number, since 2×39668957² = 3147252298935698, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 39668899 and 39668908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39668953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19834478 + 19834479.

It is an arithmetic number, because the mean of its divisors is an integer number (19834479).

Almost surely, 2^39668957 is an apocalyptic number.

It is an amenable number.

39668957 is a deficient number, since it is larger than the sum of its proper divisors (1).

39668957 is an equidigital number, since it uses as much as digits as its factorization.

39668957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2449440, while the sum is 53.

The square root of 39668957 is about 6298.3296992139. The cubic root of 39668957 is about 341.0491153100.

The spelling of 39668957 in words is "thirty-nine million, six hundred sixty-eight thousand, nine hundred fifty-seven".