620971 has 8 divisors (see below), whose sum is σ = 687344. Its totient is φ = 557280.

The previous prime is 620957. The next prime is 620981. The reversal of 620971 is 179026.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-620971 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620911) 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, 165 + ... + 1126.

It is an arithmetic number, because the mean of its divisors is an integer number (85918).

2⁶²⁰⁹⁷¹ is an apocalyptic number.

620971 is a deficient number, since it is larger than the sum of its proper divisors (66373).

620971 is a wasteful number, since it uses less digits than its factorization.

620971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1341.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 620971 is about 788.0171317935. The cubic root of 620971 is about 85.3146813211.

Adding to 620971 its reverse (179026), we get a palindrome (799997).

The spelling of 620971 in words is "six hundred twenty thousand, nine hundred seventy-one".