621199 has 4 divisors (see below), whose sum is σ = 634464. Its totient is φ = 607936.

The previous prime is 621143. The next prime is 621217. The reversal of 621199 is 991126.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 991126 = 2 ⋅495563.

It is a cyclic number.

It is not a de Polignac number, because 621199 - 2¹³ = 613007 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6562 + ... + 6655.

It is an arithmetic number, because the mean of its divisors is an integer number (158616).

2⁶²¹¹⁹⁹ is an apocalyptic number.

621199 is a deficient number, since it is larger than the sum of its proper divisors (13265).

621199 is a wasteful number, since it uses less digits than its factorization.

621199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13264.

The product of its digits is 972, while the sum is 28.

The square root of 621199 is about 788.1617854223. The cubic root of 621199 is about 85.3251216192.

It can be divided in two parts, 62119 and 9, that added together give a triangular number (62128 = T₃₅₂).

The spelling of 621199 in words is "six hundred twenty-one thousand, one hundred ninety-nine".