7924625081 has 2 divisors, whose sum is σ = 7924625082. Its totient is φ = 7924625080.

The previous prime is 7924624979. The next prime is 7924625087. The reversal of 7924625081 is 1805264297.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4119585856 + 3805039225 = 64184^2 + 61685^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7924625081 is a prime.

It is a super-2 number, since 2×7924625081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7924625087) 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, 3962312540 + 3962312541.

It is an arithmetic number, because the mean of its divisors is an integer number (3962312541).

Almost surely, 2^7924625081 is an apocalyptic number.

It is an amenable number.

7924625081 is a deficient number, since it is larger than the sum of its proper divisors (1).

7924625081 is an equidigital number, since it uses as much as digits as its factorization.

7924625081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 7924625081 is about 89020.3632940239. The cubic root of 7924625081 is about 1993.6989258301.

The spelling of 7924625081 in words is "seven billion, nine hundred twenty-four million, six hundred twenty-five thousand, eighty-one".