384478977 has 4 divisors (see below), whose sum is σ = 512638640. Its totient is φ = 256319316.

The previous prime is 384478973. The next prime is 384478979. The reversal of 384478977 is 779874483.

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, and also an emirpimes, since its reverse is a distinct semiprime: 779874483 = 3 ⋅259958161.

It is not a de Polignac number, because 384478977 - 2² = 384478973 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (384478973) 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, 64079827 + ... + 64079832.

It is an arithmetic number, because the mean of its divisors is an integer number (128159660).

Almost surely, 2^384478977 is an apocalyptic number.

It is an amenable number.

384478977 is a deficient number, since it is larger than the sum of its proper divisors (128159663).

384478977 is a wasteful number, since it uses less digits than its factorization.

384478977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128159662.

The product of its digits is 9483264, while the sum is 57.

The square root of 384478977 is about 19608.1354799481. The cubic root of 384478977 is about 727.1503195440.

The spelling of 384478977 in words is "three hundred eighty-four million, four hundred seventy-eight thousand, nine hundred seventy-seven".