620787 has 8 divisors (see below), whose sum is σ = 871360. Its totient is φ = 392040.

The previous prime is 620777. The next prime is 620813. The reversal of 620787 is 787026.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 620787 - 2⁴ = 620771 is a prime.

It is a Duffinian number.

620787 is a lucky number.

It is a plaindrome in base 14.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 620787.

It is not an unprimeable number, because it can be changed into a prime (620717) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5389 + ... + 5502.

It is an arithmetic number, because the mean of its divisors is an integer number (108920).

2⁶²⁰⁷⁸⁷ is an apocalyptic number.

620787 is a deficient number, since it is larger than the sum of its proper divisors (250573).

620787 is a wasteful number, since it uses less digits than its factorization.

620787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10913.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 620787 is about 787.9003744129. The cubic root of 620787 is about 85.3062539537.

The spelling of 620787 in words is "six hundred twenty thousand, seven hundred eighty-seven".