621423761 has 8 divisors (see below), whose sum is σ = 710723904. Its totient is φ = 532254960.

The previous prime is 621423743. The next prime is 621423767. The reversal of 621423761 is 167324126.

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 621423761 - 2⁶ = 621423697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621423767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22475 + ... + 41808.

It is an arithmetic number, because the mean of its divisors is an integer number (88840488).

Almost surely, 2^621423761 is an apocalyptic number.

It is an amenable number.

621423761 is a deficient number, since it is larger than the sum of its proper divisors (89300143).

621423761 is a wasteful number, since it uses less digits than its factorization.

621423761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65671.

The product of its digits is 12096, while the sum is 32.

The square root of 621423761 is about 24928.3726103410. The cubic root of 621423761 is about 853.3541110087.

Adding to 621423761 its reverse (167324126), we get a palindrome (788747887).

The spelling of 621423761 in words is "six hundred twenty-one million, four hundred twenty-three thousand, seven hundred sixty-one".