77619923 has 2 divisors, whose sum is σ = 77619924. Its totient is φ = 77619922.

The previous prime is 77619901. The next prime is 77619947. The reversal of 77619923 is 32991677.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77619923 - 2¹⁰ = 77618899 is a prime.

It is not a weakly prime, because it can be changed into another prime (77619973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38809961 + 38809962.

It is an arithmetic number, because the mean of its divisors is an integer number (38809962).

Almost surely, 2^77619923 is an apocalyptic number.

77619923 is a deficient number, since it is larger than the sum of its proper divisors (1).

77619923 is an equidigital number, since it uses as much as digits as its factorization.

77619923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 142884, while the sum is 44.

The square root of 77619923 is about 8810.2169666814. The cubic root of 77619923 is about 426.5707467346.

The spelling of 77619923 in words is "seventy-seven million, six hundred nineteen thousand, nine hundred twenty-three".