102140679749 has 2 divisors, whose sum is σ = 102140679750. Its totient is φ = 102140679748.

The previous prime is 102140679727. The next prime is 102140679799. The reversal of 102140679749 is 947976041201.

It is an a-pointer prime, because the next prime (102140679799) can be obtained adding 102140679749 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59433564100 + 42707115649 = 243790^2 + 206657^2 .

It is a cyclic number.

It is not a de Polignac number, because 102140679749 - 2²⁰ = 102139631173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102140679697 and 102140679706.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102140679799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51070339874 + 51070339875.

It is an arithmetic number, because the mean of its divisors is an integer number (51070339875).

Almost surely, 2^102140679749 is an apocalyptic number.

It is an amenable number.

102140679749 is a deficient number, since it is larger than the sum of its proper divisors (1).

102140679749 is an equidigital number, since it uses as much as digits as its factorization.

102140679749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 762048, while the sum is 50.

The spelling of 102140679749 in words is "one hundred two billion, one hundred forty million, six hundred seventy-nine thousand, seven hundred forty-nine".