77927649 has 8 divisors (see below), whose sum is σ = 105864192. Its totient is φ = 50971440.

The previous prime is 77927639. The next prime is 77927659. The reversal of 77927649 is 94672977.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (77927639) and next prime (77927659).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77927649 - 2⁵ = 77927617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77927639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244897 + ... + 245214.

It is an arithmetic number, because the mean of its divisors is an integer number (13233024).

Almost surely, 2^77927649 is an apocalyptic number.

It is an amenable number.

77927649 is a deficient number, since it is larger than the sum of its proper divisors (27936543).

77927649 is a wasteful number, since it uses less digits than its factorization.

77927649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490167.

The product of its digits is 1333584, while the sum is 51.

The square root of 77927649 is about 8827.6638472475. The cubic root of 77927649 is about 427.1337199824.

The spelling of 77927649 in words is "seventy-seven million, nine hundred twenty-seven thousand, six hundred forty-nine".