77747023 has 2 divisors, whose sum is σ = 77747024. Its totient is φ = 77747022.

The previous prime is 77747003. The next prime is 77747063. The reversal of 77747023 is 32074777.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77747023 - 2⁹ = 77746511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77747003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38873511 + 38873512.

It is an arithmetic number, because the mean of its divisors is an integer number (38873512).

Almost surely, 2^77747023 is an apocalyptic number.

77747023 is a deficient number, since it is larger than the sum of its proper divisors (1).

77747023 is an equidigital number, since it uses as much as digits as its factorization.

77747023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57624, while the sum is 37.

The square root of 77747023 is about 8817.4272324755. The cubic root of 77747023 is about 426.8034514913.

The spelling of 77747023 in words is "seventy-seven million, seven hundred forty-seven thousand, twenty-three".