77145073 has 8 divisors (see below), whose sum is σ = 82418720. Its totient is φ = 71992800.

The previous prime is 77145049. The next prime is 77145083. The reversal of 77145073 is 37054177.

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

It is a cyclic number.

It is not a de Polignac number, because 77145073 - 2¹⁷ = 77014001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77145083) 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, 29028 + ... + 31573.

It is an arithmetic number, because the mean of its divisors is an integer number (10302340).

Almost surely, 2^77145073 is an apocalyptic number.

It is an amenable number.

77145073 is a deficient number, since it is larger than the sum of its proper divisors (5273647).

77145073 is a wasteful number, since it uses less digits than its factorization.

77145073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60687.

The product of its (nonzero) digits is 20580, while the sum is 34.

The square root of 77145073 is about 8783.2267988479. The cubic root of 77145073 is about 425.6990994506.

The spelling of 77145073 in words is "seventy-seven million, one hundred forty-five thousand, seventy-three".