77693047 has 4 divisors (see below), whose sum is σ = 77814520. Its totient is φ = 77571576.

The previous prime is 77693041. The next prime is 77693053. The reversal of 77693047 is 74039677.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (77693041) and next prime (77693053).

It is a cyclic number.

It is not a de Polignac number, because 77693047 - 2¹⁹ = 77168759 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77692994 and 77693012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77693041) 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 3 ways as a sum of consecutive naturals, for example, 59772 + ... + 61057.

It is an arithmetic number, because the mean of its divisors is an integer number (19453630).

Almost surely, 2^77693047 is an apocalyptic number.

77693047 is a deficient number, since it is larger than the sum of its proper divisors (121473).

77693047 is a wasteful number, since it uses less digits than its factorization.

77693047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121472.

The product of its (nonzero) digits is 222264, while the sum is 43.

The square root of 77693047 is about 8814.3659442980. The cubic root of 77693047 is about 426.7046589569.

It can be divided in two parts, 7769 and 3047, that added together give a square (10816 = 104²).

The spelling of 77693047 in words is "seventy-seven million, six hundred ninety-three thousand, forty-seven".