677545 has 16 divisors (see below), whose sum is σ = 903168. Its totient is φ = 483840.

The previous prime is 677543. The next prime is 677561. The reversal of 677545 is 545776.

677545 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 677545 - 2¹ = 677543 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 677545.

It is not an unprimeable number, because it can be changed into a prime (677543) 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, 5272 + ... + 5398.

It is an arithmetic number, because the mean of its divisors is an integer number (56448).

2⁶⁷⁷⁵⁴⁵ is an apocalyptic number.

It is an amenable number.

677545 is a deficient number, since it is larger than the sum of its proper divisors (225623).

677545 is a wasteful number, since it uses less digits than its factorization.

677545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240.

The product of its digits is 29400, while the sum is 34.

The square root of 677545 is about 823.1312167571. The cubic root of 677545 is about 87.8306401779.

Subtracting from 677545 its reverse (545776), we obtain a square (131769 = 363²).

It can be divided in two parts, 67 and 7545, that multiplied together give a triangular number (505515 = T₁₀₀₅).

The spelling of 677545 in words is "six hundred seventy-seven thousand, five hundred forty-five".