307989 has 32 divisors (see below), whose sum is σ = 535680. Its totient is φ = 172800.

The previous prime is 307969. The next prime is 308003. The reversal of 307989 is 989703.

It is not a de Polignac number, because 307989 - 2⁸ = 307733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (307919) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5019 + ... + 5079.

It is an arithmetic number, because the mean of its divisors is an integer number (16740).

2³⁰⁷⁹⁸⁹ is an apocalyptic number.

307989 is the 297-th nonagonal number.

It is an amenable number.

307989 is a deficient number, since it is larger than the sum of its proper divisors (227691).

307989 is a wasteful number, since it uses less digits than its factorization.

307989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98 (or 92 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 307989 is about 554.9675666199. The cubic root of 307989 is about 67.5323301915.

Adding to 307989 its sum of digits (36), we get a square (308025 = 555²).

It can be divided in two parts, 307 and 989, that added together give a 4-th power (1296 = 6⁴).

The spelling of 307989 in words is "three hundred seven thousand, nine hundred eighty-nine".