12087789 has 32 divisors (see below), whose sum is σ = 19378176. Its totient is φ = 6557760.

The previous prime is 12087787. The next prime is 12087791. The reversal of 12087789 is 98778021.

It is an interprime number because it is at equal distance from previous prime (12087787) and next prime (12087791).

It is not a de Polignac number, because 12087789 - 2¹ = 12087787 is a prime.

It is a super-2 number, since 2×12087789² = 292229285817042, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12087789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12087787) 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, 36354 + ... + 36684.

It is an arithmetic number, because the mean of its divisors is an integer number (605568).

Almost surely, 2^12087789 is an apocalyptic number.

It is an amenable number.

12087789 is a deficient number, since it is larger than the sum of its proper divisors (7290387).

12087789 is a wasteful number, since it uses less digits than its factorization.

12087789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425.

The product of its (nonzero) digits is 56448, while the sum is 42.

The square root of 12087789 is about 3476.7497752930. The cubic root of 12087789 is about 229.4997887800.

The spelling of 12087789 in words is "twelve million, eighty-seven thousand, seven hundred eighty-nine".