677993 has 4 divisors (see below), whose sum is σ = 681600. Its totient is φ = 674388.

The previous prime is 677983. The next prime is 678023. The reversal of 677993 is 399776.

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 677993 - 2⁸ = 677737 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 677993.

It is not an unprimeable number, because it can be changed into a prime (677953) 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, 1505 + ... + 1902.

It is an arithmetic number, because the mean of its divisors is an integer number (170400).

2⁶⁷⁷⁹⁹³ is an apocalyptic number.

It is an amenable number.

677993 is a deficient number, since it is larger than the sum of its proper divisors (3607).

677993 is a wasteful number, since it uses less digits than its factorization.

677993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3606.

The product of its digits is 71442, while the sum is 41.

The square root of 677993 is about 823.4033033696. The cubic root of 677993 is about 87.8499940990.

The spelling of 677993 in words is "six hundred seventy-seven thousand, nine hundred ninety-three".