387721849 has 8 divisors (see below), whose sum is σ = 391462400. Its totient is φ = 383999616.

The previous prime is 387721843. The next prime is 387721861. The reversal of 387721849 is 948127783.

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 387721849 - 2²¹ = 385624697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (387721843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40009 + ... + 48745.

It is an arithmetic number, because the mean of its divisors is an integer number (48932800).

Almost surely, 2^387721849 is an apocalyptic number.

It is an amenable number.

387721849 is a deficient number, since it is larger than the sum of its proper divisors (3740551).

387721849 is a wasteful number, since it uses less digits than its factorization.

387721849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9159.

The product of its digits is 677376, while the sum is 49.

The square root of 387721849 is about 19690.6538489711. The cubic root of 387721849 is about 729.1889716794.

The spelling of 387721849 in words is "three hundred eighty-seven million, seven hundred twenty-one thousand, eight hundred forty-nine".