7922780149 has 2 divisors, whose sum is σ = 7922780150. Its totient is φ = 7922780148.

The previous prime is 7922780059. The next prime is 7922780153. The reversal of 7922780149 is 9410872297.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7922780100 + 49 = 89010^2 + 7^2 .

It is an emirp because it is prime and its reverse (9410872297) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7922780149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7922780179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3961390074 + 3961390075.

It is an arithmetic number, because the mean of its divisors is an integer number (3961390075).

Almost surely, 2^7922780149 is an apocalyptic number.

It is an amenable number.

7922780149 is a deficient number, since it is larger than the sum of its proper divisors (1).

7922780149 is an equidigital number, since it uses as much as digits as its factorization.

7922780149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 508032, while the sum is 49.

The square root of 7922780149 is about 89010.0002752500. Note that the first 3 decimals coincide. The cubic root of 7922780149 is about 1993.5441961367.

Subtracting from 7922780149 its sum of digits (49), we obtain a square (7922780100 = 89010²).

It can be divided in two parts, 79227801 and 49, that multiplied together give a square (3882162249 = 62307²).

The spelling of 7922780149 in words is "seven billion, nine hundred twenty-two million, seven hundred eighty thousand, one hundred forty-nine".