387722987 has 8 divisors (see below), whose sum is σ = 408517200. Its totient is φ = 366967584.

The previous prime is 387722971. The next prime is 387723059. The reversal of 387722987 is 789227783.

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 387722987 - 2⁴ = 387722971 is a prime.

It is a super-2 number, since 2×387722987² = 300658229296404338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (387722947) 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, 12089 + ... + 30357.

It is an arithmetic number, because the mean of its divisors is an integer number (51064650).

Almost surely, 2^387722987 is an apocalyptic number.

387722987 is a deficient number, since it is larger than the sum of its proper divisors (20794213).

387722987 is a wasteful number, since it uses less digits than its factorization.

387722987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19405.

The product of its digits is 2370816, while the sum is 53.

The square root of 387722987 is about 19690.6827459080. The cubic root of 387722987 is about 729.1896850914.

The spelling of 387722987 in words is "three hundred eighty-seven million, seven hundred twenty-two thousand, nine hundred eighty-seven".