77109379 has 2 divisors, whose sum is σ = 77109380. Its totient is φ = 77109378.

The previous prime is 77109377. The next prime is 77109413. The reversal of 77109379 is 97390177.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77109379 - 2¹ = 77109377 is a prime.

Together with 77109377, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (77109377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38554689 + 38554690.

It is an arithmetic number, because the mean of its divisors is an integer number (38554690).

Almost surely, 2^77109379 is an apocalyptic number.

77109379 is a deficient number, since it is larger than the sum of its proper divisors (1).

77109379 is an equidigital number, since it uses as much as digits as its factorization.

77109379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 83349, while the sum is 43.

The square root of 77109379 is about 8781.1946226012. The cubic root of 77109379 is about 425.6334342168.

The spelling of 77109379 in words is "seventy-seven million, one hundred nine thousand, three hundred seventy-nine".