7978153013 has 2 divisors, whose sum is σ = 7978153014. Its totient is φ = 7978153012.

The previous prime is 7978152971. The next prime is 7978153019. The reversal of 7978153013 is 3103518797.

7978153013 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., 7214293969 + 763859044 = 84937^2 + 27638^2 .

It is a cyclic number.

It is not a de Polignac number, because 7978153013 - 2¹⁶ = 7978087477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7978153019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3989076506 + 3989076507.

It is an arithmetic number, because the mean of its divisors is an integer number (3989076507).

Almost surely, 2^7978153013 is an apocalyptic number.

It is an amenable number.

7978153013 is a deficient number, since it is larger than the sum of its proper divisors (1).

7978153013 is an equidigital number, since it uses as much as digits as its factorization.

7978153013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 158760, while the sum is 44.

The square root of 7978153013 is about 89320.5072365803. The cubic root of 7978153013 is about 1998.1777579712.

The spelling of 7978153013 in words is "seven billion, nine hundred seventy-eight million, one hundred fifty-three thousand, thirteen".