621050643 has 6 divisors (see below), whose sum is σ = 897073164. Its totient is φ = 414033756.

The previous prime is 621050641. The next prime is 621050653. The reversal of 621050643 is 346050126.

621050643 is a `hidden beast` number, since 6 + 2 + 10 + 5 + 0 + 643 = 666.

It is not a de Polignac number, because 621050643 - 2¹ = 621050641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (621050641) 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 5 ways as a sum of consecutive naturals, for example, 34502805 + ... + 34502822.

It is an arithmetic number, because the mean of its divisors is an integer number (149512194).

Almost surely, 2^621050643 is an apocalyptic number.

621050643 is a deficient number, since it is larger than the sum of its proper divisors (276022521).

621050643 is a wasteful number, since it uses less digits than its factorization.

621050643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69005633 (or 69005630 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 621050643 is about 24920.8876848318. The cubic root of 621050643 is about 853.1832852664.

The spelling of 621050643 in words is "six hundred twenty-one million, fifty thousand, six hundred forty-three".