677024921 has 4 divisors (see below), whose sum is σ = 677548212. Its totient is φ = 676501632.

The previous prime is 677024911. The next prime is 677024969. The reversal of 677024921 is 129420776.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 369408400 + 307616521 = 19220^2 + 17539^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-677024921 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (677024911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 259700 + ... + 262293.

It is an arithmetic number, because the mean of its divisors is an integer number (169387053).

Almost surely, 2^677024921 is an apocalyptic number.

It is an amenable number.

677024921 is a deficient number, since it is larger than the sum of its proper divisors (523291).

677024921 is a wasteful number, since it uses less digits than its factorization.

677024921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523290.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 677024921 is about 26019.7025540262. The cubic root of 677024921 is about 878.0816168855.

The spelling of 677024921 in words is "six hundred seventy-seven million, twenty-four thousand, nine hundred twenty-one".