626721041 has 4 divisors (see below), whose sum is σ = 626773872. Its totient is φ = 626668212.

The previous prime is 626721013. The next prime is 626721049. The reversal of 626721041 is 140127626.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 626721041 - 2¹⁴ = 626704657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 626720995 and 626721013.

It is not an unprimeable number, because it can be changed into a prime (626721049) 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 3 ways as a sum of consecutive naturals, for example, 566 + ... + 35408.

It is an arithmetic number, because the mean of its divisors is an integer number (156693468).

Almost surely, 2^626721041 is an apocalyptic number.

It is an amenable number.

626721041 is a deficient number, since it is larger than the sum of its proper divisors (52831).

626721041 is a wasteful number, since it uses less digits than its factorization.

626721041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52830.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 626721041 is about 25034.3971567122. The cubic root of 626721041 is about 855.7720377513.

Adding to 626721041 its reverse (140127626), we get a palindrome (766848667).

The spelling of 626721041 in words is "six hundred twenty-six million, seven hundred twenty-one thousand, forty-one".