207812989 has 8 divisors (see below), whose sum is σ = 209993472. Its totient is φ = 205638720.

The previous prime is 207812987. The next prime is 207813017. The reversal of 207812989 is 989218702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 207812989 - 2¹ = 207812987 is a prime.

It is a super-2 number, since 2×207812989² = 86372476794228242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (207812987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96454 + ... + 98584.

It is an arithmetic number, because the mean of its divisors is an integer number (26249184).

Almost surely, 2^207812989 is an apocalyptic number.

It is an amenable number.

207812989 is a deficient number, since it is larger than the sum of its proper divisors (2180483).

207812989 is a wasteful number, since it uses less digits than its factorization.

207812989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3107.

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 207812989 is about 14415.7202039995. The cubic root of 207812989 is about 592.3215901324.

The spelling of 207812989 in words is "two hundred seven million, eight hundred twelve thousand, nine hundred eighty-nine".