610778101 has 2 divisors, whose sum is σ = 610778102. Its totient is φ = 610778100.

The previous prime is 610778099. The next prime is 610778153. The reversal of 610778101 is 101877016.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 373648900 + 237129201 = 19330^2 + 15399^2 .

It is a cyclic number.

It is not a de Polignac number, because 610778101 - 2¹ = 610778099 is a prime.

It is a super-2 number, since 2×610778101² = 746099777322332402, which contains 22 as substring.

Together with 610778099, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (610778191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305389050 + 305389051.

It is an arithmetic number, because the mean of its divisors is an integer number (305389051).

Almost surely, 2^610778101 is an apocalyptic number.

It is an amenable number.

610778101 is a deficient number, since it is larger than the sum of its proper divisors (1).

610778101 is an equidigital number, since it uses as much as digits as its factorization.

610778101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2352, while the sum is 31.

The square root of 610778101 is about 24713.9252446875. The cubic root of 610778101 is about 848.4530576581.

The spelling of 610778101 in words is "six hundred ten million, seven hundred seventy-eight thousand, one hundred one".