39069661 has 2 divisors, whose sum is σ = 39069662. Its totient is φ = 39069660.

The previous prime is 39069619. The next prime is 39069691. The reversal of 39069661 is 16696093.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38204761 + 864900 = 6181^2 + 930^2 .

It is an emirp because it is prime and its reverse (16696093) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39069661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39069601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19534830 + 19534831.

It is an arithmetic number, because the mean of its divisors is an integer number (19534831).

Almost surely, 2^39069661 is an apocalyptic number.

It is an amenable number.

39069661 is a deficient number, since it is larger than the sum of its proper divisors (1).

39069661 is an equidigital number, since it uses as much as digits as its factorization.

39069661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 39069661 is about 6250.5728537471. The cubic root of 39069661 is about 339.3229346150.

The spelling of 39069661 in words is "thirty-nine million, sixty-nine thousand, six hundred sixty-one".