77791433 has 2 divisors, whose sum is σ = 77791434. Its totient is φ = 77791432.

The previous prime is 77791421. The next prime is 77791457. The reversal of 77791433 is 33419777.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76510009 + 1281424 = 8747^2 + 1132^2 .

It is an emirp because it is prime and its reverse (33419777) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77791433 - 2¹⁰ = 77790409 is a prime.

It is not a weakly prime, because it can be changed into another prime (77791463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38895716 + 38895717.

It is an arithmetic number, because the mean of its divisors is an integer number (38895717).

Almost surely, 2^77791433 is an apocalyptic number.

It is an amenable number.

77791433 is a deficient number, since it is larger than the sum of its proper divisors (1).

77791433 is an equidigital number, since it uses as much as digits as its factorization.

77791433 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 111132, while the sum is 41.

The square root of 77791433 is about 8819.9451812355. The cubic root of 77791433 is about 426.8847010479.

The spelling of 77791433 in words is "seventy-seven million, seven hundred ninety-one thousand, four hundred thirty-three".