621479 has 8 divisors (see below), whose sum is σ = 646800. Its totient is φ = 596736.

The previous prime is 621473. The next prime is 621521. The reversal of 621479 is 974126.

621479 is nontrivially palindromic in base 7.

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 621479 - 2⁸ = 621223 is a prime.

It is a super-2 number, since 2×621479² = 772472294882, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4097 + ... + 4245.

It is an arithmetic number, because the mean of its divisors is an integer number (80850).

2⁶²¹⁴⁷⁹ is an apocalyptic number.

621479 is a deficient number, since it is larger than the sum of its proper divisors (25321).

621479 is a wasteful number, since it uses less digits than its factorization.

621479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289.

The product of its digits is 3024, while the sum is 29.

The square root of 621479 is about 788.3393939161. The cubic root of 621479 is about 85.3379395436.

The spelling of 621479 in words is "six hundred twenty-one thousand, four hundred seventy-nine".