207507997 has 2 divisors, whose sum is σ = 207507998. Its totient is φ = 207507996.

The previous prime is 207507977. The next prime is 207508013. The reversal of 207507997 is 799705702.

It is a happy number.

207507997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134815321 + 72692676 = 11611^2 + 8526^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-207507997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (207507907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103753998 + 103753999.

It is an arithmetic number, because the mean of its divisors is an integer number (103753999).

Almost surely, 2^207507997 is an apocalyptic number.

It is an amenable number.

207507997 is a deficient number, since it is larger than the sum of its proper divisors (1).

207507997 is an equidigital number, since it uses as much as digits as its factorization.

207507997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 277830, while the sum is 46.

The square root of 207507997 is about 14405.1378681358. The cubic root of 207507997 is about 592.0316791621.

The spelling of 207507997 in words is "two hundred seven million, five hundred seven thousand, nine hundred ninety-seven".