77671449 has 12 divisors (see below), whose sum is σ = 118097200. Its totient is φ = 49055544.

The previous prime is 77671441. The next prime is 77671463. The reversal of 77671449 is 94417677.

It is not a de Polignac number, because 77671449 - 2³ = 77671441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77671441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 226939 + ... + 227280.

Almost surely, 2^77671449 is an apocalyptic number.

It is an amenable number.

77671449 is a deficient number, since it is larger than the sum of its proper divisors (40425751).

77671449 is a wasteful number, since it uses less digits than its factorization.

77671449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454244 (or 454241 counting only the distinct ones).

The product of its digits is 296352, while the sum is 45.

The square root of 77671449 is about 8813.1407001137. The cubic root of 77671449 is about 426.6651152152.

It can be divided in two parts, 7767 and 1449, that added together give a square (9216 = 96²).

The spelling of 77671449 in words is "seventy-seven million, six hundred seventy-one thousand, four hundred forty-nine".