7891379123 has 2 divisors, whose sum is σ = 7891379124. Its totient is φ = 7891379122.

The previous prime is 7891379087. The next prime is 7891379173. The reversal of 7891379123 is 3219731987.

It is an a-pointer prime, because the next prime (7891379173) can be obtained adding 7891379123 to its sum of digits (50).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7891379123 - 2¹⁶ = 7891313587 is a prime.

It is not a weakly prime, because it can be changed into another prime (7891379173) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3945689561 + 3945689562.

It is an arithmetic number, because the mean of its divisors is an integer number (3945689562).

Almost surely, 2^7891379123 is an apocalyptic number.

7891379123 is a deficient number, since it is larger than the sum of its proper divisors (1).

7891379123 is an equidigital number, since it uses as much as digits as its factorization.

7891379123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 571536, while the sum is 50.

The square root of 7891379123 is about 88833.4347135131. The cubic root of 7891379123 is about 1990.9069814096.

The spelling of 7891379123 in words is "seven billion, eight hundred ninety-one million, three hundred seventy-nine thousand, one hundred twenty-three".