77538693 has 8 divisors (see below), whose sum is σ = 103513248. Its totient is φ = 51628304.

The previous prime is 77538691. The next prime is 77538697. The reversal of 77538693 is 39683577.

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

It is a cyclic number.

It is not a de Polignac number, because 77538693 - 2¹ = 77538691 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77538691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13146 + ... + 18107.

It is an arithmetic number, because the mean of its divisors is an integer number (12939156).

Almost surely, 2^77538693 is an apocalyptic number.

It is an amenable number.

77538693 is a deficient number, since it is larger than the sum of its proper divisors (25974555).

77538693 is a wasteful number, since it uses less digits than its factorization.

77538693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32083.

The product of its digits is 952560, while the sum is 48.

The square root of 77538693 is about 8805.6057713254. The cubic root of 77538693 is about 426.4218913259.

The spelling of 77538693 in words is "seventy-seven million, five hundred thirty-eight thousand, six hundred ninety-three".