102780127 has 2 divisors, whose sum is σ = 102780128. Its totient is φ = 102780126.

The previous prime is 102780121. The next prime is 102780149. The reversal of 102780127 is 721087201.

It is a weak prime.

It is an emirp because it is prime and its reverse (721087201) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102780127 is a prime.

It is a super-2 number, since 2×102780127² = 21127509012272258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 102780095 and 102780104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102780121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51390063 + 51390064.

It is an arithmetic number, because the mean of its divisors is an integer number (51390064).

Almost surely, 2^102780127 is an apocalyptic number.

102780127 is a deficient number, since it is larger than the sum of its proper divisors (1).

102780127 is an equidigital number, since it uses as much as digits as its factorization.

102780127 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1568, while the sum is 28.

The square root of 102780127 is about 10138.0534127612. The cubic root of 102780127 is about 468.4210285103.

The spelling of 102780127 in words is "one hundred two million, seven hundred eighty thousand, one hundred twenty-seven".