77896369 has 2 divisors, whose sum is σ = 77896370. Its totient is φ = 77896368.

The previous prime is 77896337. The next prime is 77896373. The reversal of 77896369 is 96369877.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77651344 + 245025 = 8812^2 + 495^2 .

It is an emirp because it is prime and its reverse (96369877) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77896369 - 2⁵ = 77896337 is a prime.

It is a super-2 number, since 2×77896369² = 12135688606768322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (77896069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38948184 + 38948185.

It is an arithmetic number, because the mean of its divisors is an integer number (38948185).

Almost surely, 2^77896369 is an apocalyptic number.

It is an amenable number.

77896369 is a deficient number, since it is larger than the sum of its proper divisors (1).

77896369 is an equidigital number, since it uses as much as digits as its factorization.

77896369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3429216, while the sum is 55.

The square root of 77896369 is about 8825.8919662547. The cubic root of 77896369 is about 427.0765621315.

The spelling of 77896369 in words is "seventy-seven million, eight hundred ninety-six thousand, three hundred sixty-nine".