77148789 has 8 divisors (see below), whose sum is σ = 102973632. Its totient is φ = 51378240.

The previous prime is 77148781. The next prime is 77148833. The reversal of 77148789 is 98784177.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77148789 - 2³ = 77148781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77148781) 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 in 7 ways as a sum of consecutive naturals, for example, 10132 + ... + 16029.

It is an arithmetic number, because the mean of its divisors is an integer number (12871704).

Almost surely, 2^77148789 is an apocalyptic number.

It is an amenable number.

77148789 is a deficient number, since it is larger than the sum of its proper divisors (25824843).

77148789 is a wasteful number, since it uses less digits than its factorization.

77148789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27147.

The product of its digits is 790272, while the sum is 51.

The square root of 77148789 is about 8783.4383358682. The cubic root of 77148789 is about 425.7059345056.

The spelling of 77148789 in words is "seventy-seven million, one hundred forty-eight thousand, seven hundred eighty-nine".