621339199 has 4 divisors (see below), whose sum is σ = 669134536. Its totient is φ = 573543864.

The previous prime is 621339143. The next prime is 621339209. The reversal of 621339199 is 991933126.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 991933126 = 2 ⋅495966563.

It is a cyclic number.

It is not a de Polignac number, because 621339199 - 2⁷ = 621339071 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 (621339139) 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, 23897649 + ... + 23897674.

It is an arithmetic number, because the mean of its divisors is an integer number (167283634).

Almost surely, 2^621339199 is an apocalyptic number.

621339199 is a deficient number, since it is larger than the sum of its proper divisors (47795337).

621339199 is a wasteful number, since it uses less digits than its factorization.

621339199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47795336.

The product of its digits is 78732, while the sum is 43.

The square root of 621339199 is about 24926.6764531495. The cubic root of 621339199 is about 853.3154017262.

The spelling of 621339199 in words is "six hundred twenty-one million, three hundred thirty-nine thousand, one hundred ninety-nine".