677391 has 16 divisors (see below), whose sum is σ = 1061760. Its totient is φ = 378720.

The previous prime is 677387. The next prime is 677423. The reversal of 677391 is 193776.

677391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 677391 - 2² = 677387 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (677311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 361 + ... + 1218.

It is an arithmetic number, because the mean of its divisors is an integer number (66360).

2⁶⁷⁷³⁹¹ is an apocalyptic number.

677391 is a deficient number, since it is larger than the sum of its proper divisors (384369).

677391 is a wasteful number, since it uses less digits than its factorization.

677391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1606.

The product of its digits is 7938, while the sum is 33.

The square root of 677391 is about 823.0376662098. The cubic root of 677391 is about 87.8239852971.

The spelling of 677391 in words is "six hundred seventy-seven thousand, three hundred ninety-one".