621341753 has 2 divisors, whose sum is σ = 621341754. Its totient is φ = 621341752.

The previous prime is 621341731. The next prime is 621341761. The reversal of 621341753 is 357143126.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 563017984 + 58323769 = 23728^2 + 7637^2 .

It is a cyclic number.

It is not a de Polignac number, because 621341753 - 2⁶ = 621341689 is a prime.

It is a super-2 number, since 2×621341753² = 772131148042226018, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (621341353) 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 as a sum of consecutive naturals, namely, 310670876 + 310670877.

It is an arithmetic number, because the mean of its divisors is an integer number (310670877).

Almost surely, 2^621341753 is an apocalyptic number.

It is an amenable number.

621341753 is a deficient number, since it is larger than the sum of its proper divisors (1).

621341753 is an equidigital number, since it uses as much as digits as its factorization.

621341753 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 32.

The square root of 621341753 is about 24926.7276833523. The cubic root of 621341753 is about 853.3165709021.

Adding to 621341753 its reverse (357143126), we get a palindrome (978484879).

The spelling of 621341753 in words is "six hundred twenty-one million, three hundred forty-one thousand, seven hundred fifty-three".