77604091 has 2 divisors, whose sum is σ = 77604092. Its totient is φ = 77604090.

The previous prime is 77604089. The next prime is 77604119. The reversal of 77604091 is 19040677.

It is a weak prime.

It is an emirp because it is prime and its reverse (19040677) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77604091 - 2¹ = 77604089 is a prime.

Together with 77604089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (77604041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38802045 + 38802046.

It is an arithmetic number, because the mean of its divisors is an integer number (38802046).

Almost surely, 2^77604091 is an apocalyptic number.

77604091 is a deficient number, since it is larger than the sum of its proper divisors (1).

77604091 is an equidigital number, since it uses as much as digits as its factorization.

77604091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 77604091 is about 8809.3184185838. The cubic root of 77604091 is about 426.5417424660.

The spelling of 77604091 in words is "seventy-seven million, six hundred four thousand, ninety-one".