678915377 has 4 divisors (see below), whose sum is σ = 775903296. Its totient is φ = 581927460.

The previous prime is 678915373. The next prime is 678915379. The reversal of 678915377 is 773519876.

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 a cyclic number.

It is not a de Polignac number, because 678915377 - 2² = 678915373 is a prime.

It is not an unprimeable number, because it can be changed into a prime (678915373) 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, 48493949 + ... + 48493962.

It is an arithmetic number, because the mean of its divisors is an integer number (193975824).

Almost surely, 2^678915377 is an apocalyptic number.

It is an amenable number.

678915377 is a deficient number, since it is larger than the sum of its proper divisors (96987919).

678915377 is an equidigital number, since it uses as much as digits as its factorization.

678915377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96987918.

The product of its digits is 2222640, while the sum is 53.

The square root of 678915377 is about 26056.0046246542. The cubic root of 678915377 is about 878.8981461611.

The spelling of 678915377 in words is "six hundred seventy-eight million, nine hundred fifteen thousand, three hundred seventy-seven".