621499 has 6 divisors (see below), whose sum is σ = 644540. Its totient is φ = 599256.

The previous prime is 621473. The next prime is 621521. The reversal of 621499 is 994126.

It is a happy number.

It is not a de Polignac number, because 621499 - 2⁷ = 621371 is a prime.

It is a super-2 number, since 2×621499² = 772522014002, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 621499.

It is not an unprimeable number, because it can be changed into a prime (621419) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 472 + ... + 1210.

2⁶²¹⁴⁹⁹ is an apocalyptic number.

621499 is a deficient number, since it is larger than the sum of its proper divisors (23041).

621499 is an equidigital number, since it uses as much as digits as its factorization.

621499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797 (or 768 counting only the distinct ones).

The product of its digits is 3888, while the sum is 31.

The square root of 621499 is about 788.3520787060. The cubic root of 621499 is about 85.3388549623.

The spelling of 621499 in words is "six hundred twenty-one thousand, four hundred ninety-nine".