102072277 has 2 divisors, whose sum is σ = 102072278. Its totient is φ = 102072276.

The previous prime is 102072263. The next prime is 102072293. The reversal of 102072277 is 772270201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83010321 + 19061956 = 9111^2 + 4366^2 .

It is an emirp because it is prime and its reverse (772270201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102072277 - 2⁷ = 102072149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102072877) 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, 51036138 + 51036139.

It is an arithmetic number, because the mean of its divisors is an integer number (51036139).

Almost surely, 2^102072277 is an apocalyptic number.

It is an amenable number.

102072277 is a deficient number, since it is larger than the sum of its proper divisors (1).

102072277 is an equidigital number, since it uses as much as digits as its factorization.

102072277 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2744, while the sum is 28.

The square root of 102072277 is about 10103.0825494005. The cubic root of 102072277 is about 467.3432068780.

The spelling of 102072277 in words is "one hundred two million, seventy-two thousand, two hundred seventy-seven".