207997147 has 2 divisors, whose sum is σ = 207997148. Its totient is φ = 207997146.

The previous prime is 207997121. The next prime is 207997151. The reversal of 207997147 is 741799702.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-207997147 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 207997097 and 207997106.

It is not a weakly prime, because it can be changed into another prime (207997157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103998573 + 103998574.

It is an arithmetic number, because the mean of its divisors is an integer number (103998574).

Almost surely, 2^207997147 is an apocalyptic number.

207997147 is a deficient number, since it is larger than the sum of its proper divisors (1).

207997147 is an equidigital number, since it uses as much as digits as its factorization.

207997147 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 222264, while the sum is 46.

The square root of 207997147 is about 14422.1061915380. The cubic root of 207997147 is about 592.4965046943.

The spelling of 207997147 in words is "two hundred seven million, nine hundred ninety-seven thousand, one hundred forty-seven".