7794948157 has 2 divisors, whose sum is σ = 7794948158. Its totient is φ = 7794948156.

The previous prime is 7794948067. The next prime is 7794948169. The reversal of 7794948157 is 7518494977.

7794948157 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7544485881 + 250462276 = 86859^2 + 15826^2 .

It is a cyclic number.

It is not a de Polignac number, because 7794948157 - 2¹¹ = 7794946109 is a prime.

It is a super-2 number, since 2×7794948157² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7794948095 and 7794948104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7794948757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3897474078 + 3897474079.

It is an arithmetic number, because the mean of its divisors is an integer number (3897474079).

Almost surely, 2^7794948157 is an apocalyptic number.

It is an amenable number.

7794948157 is a deficient number, since it is larger than the sum of its proper divisors (1).

7794948157 is an equidigital number, since it uses as much as digits as its factorization.

7794948157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17781120, while the sum is 61.

The square root of 7794948157 is about 88289.0036018076. The cubic root of 7794948157 is about 1982.7642373474.

The spelling of 7794948157 in words is "seven billion, seven hundred ninety-four million, nine hundred forty-eight thousand, one hundred fifty-seven".