39135997 has 2 divisors, whose sum is σ = 39135998. Its totient is φ = 39135996.

The previous prime is 39135979. The next prime is 39136021. The reversal of 39135997 is 79953193.

Together with previous prime (39135979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34234201 + 4901796 = 5851^2 + 2214^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39135997 is a prime.

It is a super-2 number, since 2×39135997² = 3063252522368018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39135907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19567998 + 19567999.

It is an arithmetic number, because the mean of its divisors is an integer number (19567999).

Almost surely, 2^39135997 is an apocalyptic number.

It is an amenable number.

39135997 is a deficient number, since it is larger than the sum of its proper divisors (1).

39135997 is an equidigital number, since it uses as much as digits as its factorization.

39135997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 229635, while the sum is 46.

The square root of 39135997 is about 6255.8769968726. The cubic root of 39135997 is about 339.5148704050.

The spelling of 39135997 in words is "thirty-nine million, one hundred thirty-five thousand, nine hundred ninety-seven".