207916989 has 16 divisors (see below), whose sum is σ = 317112960. Its totient is φ = 118702080.

The previous prime is 207916967. The next prime is 207917009. The reversal of 207916989 is 989619702.

It is a happy number.

It is not a de Polignac number, because 207916989 - 2⁸ = 207916733 is a prime.

It is a super-2 number, since 2×207916989² = 86458948629652242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (207916789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23229 + ... + 30909.

It is an arithmetic number, because the mean of its divisors is an integer number (19819560).

Almost surely, 2^207916989 is an apocalyptic number.

It is an amenable number.

207916989 is a deficient number, since it is larger than the sum of its proper divisors (109195971).

207916989 is a wasteful number, since it uses less digits than its factorization.

207916989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8980.

The product of its (nonzero) digits is 489888, while the sum is 51.

The square root of 207916989 is about 14419.3269260392. The cubic root of 207916989 is about 592.4203827574.

The spelling of 207916989 in words is "two hundred seven million, nine hundred sixteen thousand, nine hundred eighty-nine".