102722839 has 2 divisors, whose sum is σ = 102722840. Its totient is φ = 102722838.

The previous prime is 102722819. The next prime is 102722849. The reversal of 102722839 is 938227201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 102722839 - 2⁹ = 102722327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102722819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51361419 + 51361420.

It is an arithmetic number, because the mean of its divisors is an integer number (51361420).

Almost surely, 2^102722839 is an apocalyptic number.

102722839 is a deficient number, since it is larger than the sum of its proper divisors (1).

102722839 is an equidigital number, since it uses as much as digits as its factorization.

102722839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 102722839 is about 10135.2276244789. The cubic root of 102722839 is about 468.3339822041. Note that the first 3 decimals are identical.

The spelling of 102722839 in words is "one hundred two million, seven hundred twenty-two thousand, eight hundred thirty-nine".