39309937 has 2 divisors, whose sum is σ = 39309938. Its totient is φ = 39309936.

The previous prime is 39309923. The next prime is 39309943. The reversal of 39309937 is 73990393.

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., 21678336 + 17631601 = 4656^2 + 4199^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39309937 is a prime.

It is a super-2 number, since 2×39309937² = 3090542293887938, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 39309893 and 39309902.

It is not a weakly prime, because it can be changed into another prime (39309337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19654968 + 19654969.

It is an arithmetic number, because the mean of its divisors is an integer number (19654969).

Almost surely, 2^39309937 is an apocalyptic number.

It is an amenable number.

39309937 is a deficient number, since it is larger than the sum of its proper divisors (1).

39309937 is an equidigital number, since it uses as much as digits as its factorization.

39309937 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 137781, while the sum is 43.

The square root of 39309937 is about 6269.7637116561. The cubic root of 39309937 is about 340.0171185153.

The spelling of 39309937 in words is "thirty-nine million, three hundred nine thousand, nine hundred thirty-seven".