77712449 has 4 divisors (see below), whose sum is σ = 77733936. Its totient is φ = 77690964.

The previous prime is 77712433. The next prime is 77712461. The reversal of 77712449 is 94421777.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 77712449 - 2⁴ = 77712433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77712409) 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, 3839 + ... + 13044.

It is an arithmetic number, because the mean of its divisors is an integer number (19433484).

Almost surely, 2^77712449 is an apocalyptic number.

It is an amenable number.

77712449 is a deficient number, since it is larger than the sum of its proper divisors (21487).

77712449 is a wasteful number, since it uses less digits than its factorization.

77712449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21486.

The product of its digits is 98784, while the sum is 41.

The square root of 77712449 is about 8815.4664652530. The cubic root of 77712449 is about 426.7401757976.

The spelling of 77712449 in words is "seventy-seven million, seven hundred twelve thousand, four hundred forty-nine".