77338145 has 4 divisors (see below), whose sum is σ = 92805780. Its totient is φ = 61870512.

The previous prime is 77338141. The next prime is 77338153. The reversal of 77338145 is 54183377.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54183377 = 23 ⋅2355799.

It can be written as a sum of positive squares in 2 ways, for example, as 41422096 + 35916049 = 6436^2 + 5993^2 .

It is a cyclic number.

It is not a de Polignac number, because 77338145 - 2² = 77338141 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77338099 and 77338108.

It is not an unprimeable number, because it can be changed into a prime (77338141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7733810 + ... + 7733819.

It is an arithmetic number, because the mean of its divisors is an integer number (23201445).

Almost surely, 2^77338145 is an apocalyptic number.

It is an amenable number.

77338145 is a deficient number, since it is larger than the sum of its proper divisors (15467635).

77338145 is a wasteful number, since it uses less digits than its factorization.

77338145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15467634.

The product of its digits is 70560, while the sum is 38.

The square root of 77338145 is about 8794.2108798914. The cubic root of 77338145 is about 426.0539378610.

The spelling of 77338145 in words is "seventy-seven million, three hundred thirty-eight thousand, one hundred forty-five".