77995193 has 2 divisors, whose sum is σ = 77995194. Its totient is φ = 77995192.

The previous prime is 77995153. The next prime is 77995219. The reversal of 77995193 is 39159977.

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., 67289209 + 10705984 = 8203^2 + 3272^2 .

It is a cyclic number.

It is not a de Polignac number, because 77995193 - 2²⁴ = 61217977 is a prime.

It is a super-2 number, since 2×77995193² = 12166500262214498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (77995103) 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, 38997596 + 38997597.

It is an arithmetic number, because the mean of its divisors is an integer number (38997597).

Almost surely, 2^77995193 is an apocalyptic number.

It is an amenable number.

77995193 is a deficient number, since it is larger than the sum of its proper divisors (1).

77995193 is an equidigital number, since it uses as much as digits as its factorization.

77995193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 535815, while the sum is 50.

The square root of 77995193 is about 8831.4887193496. The cubic root of 77995193 is about 427.2570907800.

The spelling of 77995193 in words is "seventy-seven million, nine hundred ninety-five thousand, one hundred ninety-three".