77874623 has 2 divisors, whose sum is σ = 77874624. Its totient is φ = 77874622.

The previous prime is 77874583. The next prime is 77874647. The reversal of 77874623 is 32647877.

It is a strong prime.

It is an emirp because it is prime and its reverse (32647877) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77874623 - 2¹⁰ = 77873599 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77870623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38937311 + 38937312.

It is an arithmetic number, because the mean of its divisors is an integer number (38937312).

Almost surely, 2^77874623 is an apocalyptic number.

77874623 is a deficient number, since it is larger than the sum of its proper divisors (1).

77874623 is an equidigital number, since it uses as much as digits as its factorization.

77874623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 395136, while the sum is 44.

The square root of 77874623 is about 8824.6599367908. The cubic root of 77874623 is about 427.0368167134.

The spelling of 77874623 in words is "seventy-seven million, eight hundred seventy-four thousand, six hundred twenty-three".