387890099 has 8 divisors (see below), whose sum is σ = 397264560. Its totient is φ = 378625536.

The previous prime is 387890089. The next prime is 387890137. The reversal of 387890099 is 990098783.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-387890099 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 387890099.

It is not an unprimeable number, because it can be changed into a prime (387890029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20309 + ... + 34470.

It is an arithmetic number, because the mean of its divisors is an integer number (49658070).

Almost surely, 2^387890099 is an apocalyptic number.

387890099 is a deficient number, since it is larger than the sum of its proper divisors (9374461).

387890099 is an equidigital number, since it uses as much as digits as its factorization.

387890099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54949.

The product of its (nonzero) digits is 979776, while the sum is 53.

The square root of 387890099 is about 19694.9257170470. The cubic root of 387890099 is about 729.2944324221.

The spelling of 387890099 in words is "three hundred eighty-seven million, eight hundred ninety thousand, ninety-nine".