387207089 has 4 divisors (see below), whose sum is σ = 388869156. Its totient is φ = 385545024.

The previous prime is 387207083. The next prime is 387207097. The reversal of 387207089 is 980702783.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 186049600 + 201157489 = 13640^2 + 14183^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-387207089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (387207083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 830684 + ... + 831149.

It is an arithmetic number, because the mean of its divisors is an integer number (97217289).

Almost surely, 2^387207089 is an apocalyptic number.

It is an amenable number.

387207089 is a deficient number, since it is larger than the sum of its proper divisors (1662067).

387207089 is a wasteful number, since it uses less digits than its factorization.

387207089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1662066.

The product of its (nonzero) digits is 169344, while the sum is 44.

The square root of 387207089 is about 19677.5783316952. The cubic root of 387207089 is about 728.8661255004.

The spelling of 387207089 in words is "three hundred eighty-seven million, two hundred seven thousand, eighty-nine".