387661773 has 4 divisors (see below), whose sum is σ = 516882368. Its totient is φ = 258441180.

The previous prime is 387661741. The next prime is 387661783. The reversal of 387661773 is 377166783.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 387661773 - 2⁵ = 387661741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387661783) 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 3 ways as a sum of consecutive naturals, for example, 64610293 + ... + 64610298.

It is an arithmetic number, because the mean of its divisors is an integer number (129220592).

Almost surely, 2^387661773 is an apocalyptic number.

It is an amenable number.

387661773 is a deficient number, since it is larger than the sum of its proper divisors (129220595).

387661773 is a wasteful number, since it uses less digits than its factorization.

387661773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129220594.

The product of its digits is 889056, while the sum is 48.

The square root of 387661773 is about 19689.1282945691. The cubic root of 387661773 is about 729.1513080643.

The spelling of 387661773 in words is "three hundred eighty-seven million, six hundred sixty-one thousand, seven hundred seventy-three".