620447 has 8 divisors (see below), whose sum is σ = 650496. Its totient is φ = 591192.

The previous prime is 620441. The next prime is 620461. The reversal of 620447 is 744026.

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

It is a cyclic number.

It is not a de Polignac number, because 620447 - 2⁶ = 620383 is a prime.

It is a Duffinian number.

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 620447.

It is not an unprimeable number, because it can be changed into a prime (620441) 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, 1868 + ... + 2174.

It is an arithmetic number, because the mean of its divisors is an integer number (81312).

2⁶²⁰⁴⁴⁷ is an apocalyptic number.

620447 is a deficient number, since it is larger than the sum of its proper divisors (30049).

620447 is a wasteful number, since it uses less digits than its factorization.

620447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 620447 is about 787.6845815426. The cubic root of 620447 is about 85.2906772621.

It can be divided in two parts, 620 and 447, that multiplied together give a triangular number (277140 = T₇₄₄).

The spelling of 620447 in words is "six hundred twenty thousand, four hundred forty-seven".