77589145 has 8 divisors (see below), whose sum is σ = 94382856. Its totient is φ = 61220736.

The previous prime is 77589137. The next prime is 77589167. The reversal of 77589145 is 54198577.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 27164944 + 50424201 = 5212^2 + 7101^2 .

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 77589145 - 2³ = 77589137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77589095 and 77589104.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105922 + ... + 106651.

It is an arithmetic number, because the mean of its divisors is an integer number (11797857).

Almost surely, 2^77589145 is an apocalyptic number.

It is an amenable number.

77589145 is a deficient number, since it is larger than the sum of its proper divisors (16793711).

77589145 is a wasteful number, since it uses less digits than its factorization.

77589145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212651.

The product of its digits is 352800, while the sum is 46.

The square root of 77589145 is about 8808.4700714710. The cubic root of 77589145 is about 426.5143577319.

The spelling of 77589145 in words is "seventy-seven million, five hundred eighty-nine thousand, one hundred forty-five".