3923981107157 has 2 divisors, whose sum is σ = 3923981107158. Its totient is φ = 3923981107156.

The previous prime is 3923981107141. The next prime is 3923981107201. The reversal of 3923981107157 is 7517011893293.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2893108435396 + 1030872671761 = 1700914^2 + 1015319^2 .

It is a cyclic number.

It is not a de Polignac number, because 3923981107157 - 2⁴ = 3923981107141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3923981107117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1961990553578 + 1961990553579.

It is an arithmetic number, because the mean of its divisors is an integer number (1961990553579).

Almost surely, 2^{3923981107157} is an apocalyptic number.

It is an amenable number.

3923981107157 is a deficient number, since it is larger than the sum of its proper divisors (1).

3923981107157 is an equidigital number, since it uses as much as digits as its factorization.

3923981107157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2857680, while the sum is 56.

The spelling of 3923981107157 in words is "three trillion, nine hundred twenty-three billion, nine hundred eighty-one million, one hundred seven thousand, one hundred fifty-seven".