620687 has 8 divisors (see below), whose sum is σ = 680400. Its totient is φ = 563584.

The previous prime is 620671. The next prime is 620689. The reversal of 620687 is 786026.

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

It is not a de Polignac number, because 620687 - 2⁴ = 620671 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 620687.

It is not an unprimeable number, because it can be changed into a prime (620689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137 + ... + 1122.

It is an arithmetic number, because the mean of its divisors is an integer number (85050).

2⁶²⁰⁶⁸⁷ is an apocalyptic number.

620687 is a deficient number, since it is larger than the sum of its proper divisors (59713).

620687 is a wasteful number, since it uses less digits than its factorization.

620687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1305.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 620687 is about 787.8369120573. The cubic root of 620687 is about 85.3016731644.

The spelling of 620687 in words is "six hundred twenty thousand, six hundred eighty-seven".