677492 has 6 divisors (see below), whose sum is σ = 1185618. Its totient is φ = 338744.

The previous prime is 677473. The next prime is 677531. The reversal of 677492 is 294776.

677492 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 512656 + 164836 = 716^2 + 406^2 .

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84683 + ... + 84690.

It is an arithmetic number, because the mean of its divisors is an integer number (197603).

677492 is a Friedman number, since it can be written as (9^6+7^7)/(4-2), using all its digits and the basic arithmetic operations.

2⁶⁷⁷⁴⁹² is an apocalyptic number.

It is an amenable number.

677492 is a deficient number, since it is larger than the sum of its proper divisors (508126).

677492 is a wasteful number, since it uses less digits than its factorization.

677492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169377 (or 169375 counting only the distinct ones).

The product of its digits is 21168, while the sum is 35.

The square root of 677492 is about 823.0990219895. The cubic root of 677492 is about 87.8283499756.

The spelling of 677492 in words is "six hundred seventy-seven thousand, four hundred ninety-two".