621368133 has 4 divisors (see below), whose sum is σ = 828490848. Its totient is φ = 414245420.

The previous prime is 621368107. The next prime is 621368159. The reversal of 621368133 is 331863126.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (621368107) and next prime (621368159).

It is a cyclic number.

It is not a de Polignac number, because 621368133 - 2¹³ = 621359941 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 621368094 and 621368103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621368183) 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, 103561353 + ... + 103561358.

It is an arithmetic number, because the mean of its divisors is an integer number (207122712).

Almost surely, 2^621368133 is an apocalyptic number.

It is an amenable number.

621368133 is a deficient number, since it is larger than the sum of its proper divisors (207122715).

621368133 is a wasteful number, since it uses less digits than its factorization.

621368133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207122714.

The product of its digits is 15552, while the sum is 33.

The square root of 621368133 is about 24927.2568286204. The cubic root of 621368133 is about 853.3286470113.

The spelling of 621368133 in words is "six hundred twenty-one million, three hundred sixty-eight thousand, one hundred thirty-three".