77200061 has 2 divisors, whose sum is σ = 77200062. Its totient is φ = 77200060.

The previous prime is 77200051. The next prime is 77200063. The reversal of 77200061 is 16000277.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62805625 + 14394436 = 7925^2 + 3794^2 .

It is an emirp because it is prime and its reverse (16000277) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77200061 - 2¹⁴ = 77183677 is a prime.

Together with 77200063, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77200063) 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, 38600030 + 38600031.

It is an arithmetic number, because the mean of its divisors is an integer number (38600031).

Almost surely, 2^77200061 is an apocalyptic number.

It is an amenable number.

77200061 is a deficient number, since it is larger than the sum of its proper divisors (1).

77200061 is an equidigital number, since it uses as much as digits as its factorization.

77200061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 588, while the sum is 23.

The square root of 77200061 is about 8786.3565258872. The cubic root of 77200061 is about 425.8002196805.

The spelling of 77200061 in words is "seventy-seven million, two hundred thousand, sixty-one".