7627754921 has 2 divisors, whose sum is σ = 7627754922. Its totient is φ = 7627754920.

The previous prime is 7627754881. The next prime is 7627754929. The reversal of 7627754921 is 1294577267.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6625146025 + 1002608896 = 81395^2 + 31664^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7627754921 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7627754921.

It is not a weakly prime, because it can be changed into another prime (7627754929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3813877460 + 3813877461.

It is an arithmetic number, because the mean of its divisors is an integer number (3813877461).

Almost surely, 2^7627754921 is an apocalyptic number.

It is an amenable number.

7627754921 is a deficient number, since it is larger than the sum of its proper divisors (1).

7627754921 is an equidigital number, since it uses as much as digits as its factorization.

7627754921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1481760, while the sum is 50.

The square root of 7627754921 is about 87337.0191900319. The cubic root of 7627754921 is about 1968.4856064789.

The spelling of 7627754921 in words is "seven billion, six hundred twenty-seven million, seven hundred fifty-four thousand, nine hundred twenty-one".