620621143 has 4 divisors (see below), whose sum is σ = 621448288. Its totient is φ = 619794000.

The previous prime is 620621123. The next prime is 620621171. The reversal of 620621143 is 341126026.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 620621143 - 2¹⁷ = 620490071 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 (620621123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 412446 + ... + 413947.

It is an arithmetic number, because the mean of its divisors is an integer number (155362072).

Almost surely, 2^620621143 is an apocalyptic number.

620621143 is a deficient number, since it is larger than the sum of its proper divisors (827145).

620621143 is an equidigital number, since it uses as much as digits as its factorization.

620621143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827144.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 620621143 is about 24912.2689251702. The cubic root of 620621143 is about 852.9865612519.

Adding to 620621143 its reverse (341126026), we get a palindrome (961747169).

The spelling of 620621143 in words is "six hundred twenty million, six hundred twenty-one thousand, one hundred forty-three".