621764351 has 6 divisors (see below), whose sum is σ = 673271640. Its totient is φ = 573936168.

The previous prime is 621764333. The next prime is 621764357. The reversal of 621764351 is 153467126.

It is not a de Polignac number, because 621764351 - 2¹⁰ = 621763327 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 (621764357) 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, 1839371 + ... + 1839708.

It is an arithmetic number, because the mean of its divisors is an integer number (112211940).

Almost surely, 2^621764351 is an apocalyptic number.

621764351 is a deficient number, since it is larger than the sum of its proper divisors (51507289).

621764351 is a wasteful number, since it uses less digits than its factorization.

621764351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3679105 (or 3679092 counting only the distinct ones).

The product of its digits is 30240, while the sum is 35.

The square root of 621764351 is about 24935.2030470979. The cubic root of 621764351 is about 853.5099846719.

The spelling of 621764351 in words is "six hundred twenty-one million, seven hundred sixty-four thousand, three hundred fifty-one".