621667423 has 8 divisors (see below), whose sum is σ = 676118016. Its totient is φ = 568164000.

The previous prime is 621667411. The next prime is 621667463. The reversal of 621667423 is 324766126.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 621667423 - 2⁹ = 621666911 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 (621667463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235423 + ... + 238048.

It is an arithmetic number, because the mean of its divisors is an integer number (84514752).

Almost surely, 2^621667423 is an apocalyptic number.

621667423 is a deficient number, since it is larger than the sum of its proper divisors (54450593).

621667423 is a wasteful number, since it uses less digits than its factorization.

621667423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473585.

The product of its digits is 72576, while the sum is 37.

The square root of 621667423 is about 24933.2593737762. The cubic root of 621667423 is about 853.4656306146.

The spelling of 621667423 in words is "six hundred twenty-one million, six hundred sixty-seven thousand, four hundred twenty-three".