105245342987 has 2 divisors, whose sum is σ = 105245342988. Its totient is φ = 105245342986.

The previous prime is 105245342897. The next prime is 105245343037. The reversal of 105245342987 is 789243542501.

Together with previous prime (105245342897) it forms an Ormiston pair, because they use the same digits, order apart.

It is an a-pointer prime, because the next prime (105245343037) can be obtained adding 105245342987 to its sum of digits (50).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105245342987 is a prime.

It is a super-2 number, since 2×105245342987² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (105245342287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52622671493 + 52622671494.

It is an arithmetic number, because the mean of its divisors is an integer number (52622671494).

Almost surely, 2^105245342987 is an apocalyptic number.

105245342987 is a deficient number, since it is larger than the sum of its proper divisors (1).

105245342987 is an equidigital number, since it uses as much as digits as its factorization.

105245342987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2419200, while the sum is 50.

The spelling of 105245342987 in words is "one hundred five billion, two hundred forty-five million, three hundred forty-two thousand, nine hundred eighty-seven".