77023643 has 2 divisors, whose sum is σ = 77023644. Its totient is φ = 77023642.

The previous prime is 77023607. The next prime is 77023649. The reversal of 77023643 is 34632077.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77023643 - 2¹⁰ = 77022619 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (77023649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38511821 + 38511822.

It is an arithmetic number, because the mean of its divisors is an integer number (38511822).

Almost surely, 2^77023643 is an apocalyptic number.

77023643 is a deficient number, since it is larger than the sum of its proper divisors (1).

77023643 is an equidigital number, since it uses as much as digits as its factorization.

77023643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 32.

The square root of 77023643 is about 8776.3114689487. The cubic root of 77023643 is about 425.4756253059.

The spelling of 77023643 in words is "seventy-seven million, twenty-three thousand, six hundred forty-three".