77132849 has 4 divisors (see below), whose sum is σ = 79014180. Its totient is φ = 75251520.

The previous prime is 77132843. The next prime is 77132873. The reversal of 77132849 is 94823177.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94823177 = 4013 ⋅23629.

It can be written as a sum of positive squares in 2 ways, for example, as 2050624 + 75082225 = 1432^2 + 8665^2 .

It is a cyclic number.

It is not a de Polignac number, because 77132849 - 2²⁰ = 76084273 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 1881289 = 77132849 / (7 + 7 + 1 + 3 + 2 + 8 + 4 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77132843) 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, 940604 + ... + 940685.

It is an arithmetic number, because the mean of its divisors is an integer number (19753545).

Almost surely, 2^77132849 is an apocalyptic number.

It is an amenable number.

77132849 is a deficient number, since it is larger than the sum of its proper divisors (1881331).

77132849 is a wasteful number, since it uses less digits than its factorization.

77132849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1881330.

The product of its digits is 84672, while the sum is 41.

The square root of 77132849 is about 8782.5308994617. The cubic root of 77132849 is about 425.6766135874.

The spelling of 77132849 in words is "seventy-seven million, one hundred thirty-two thousand, eight hundred forty-nine".