207745989 has 12 divisors (see below), whose sum is σ = 304465728. Its totient is φ = 125906440.

The previous prime is 207745987. The next prime is 207745997. The reversal of 207745989 is 989547702.

It is not a de Polignac number, because 207745989 - 2¹ = 207745987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (207745987) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 285789 + ... + 286514.

It is an arithmetic number, because the mean of its divisors is an integer number (25372144).

Almost surely, 2^207745989 is an apocalyptic number.

It is an amenable number.

207745989 is a deficient number, since it is larger than the sum of its proper divisors (96719739).

207745989 is a wasteful number, since it uses less digits than its factorization.

207745989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572328 (or 572317 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 51.

The square root of 207745989 is about 14413.3961646796. The cubic root of 207745989 is about 592.2579274254.

The spelling of 207745989 in words is "two hundred seven million, seven hundred forty-five thousand, nine hundred eighty-nine".