76728653 has 4 divisors (see below), whose sum is σ = 76746720. Its totient is φ = 76710588.

The previous prime is 76728647. The next prime is 76728661. The reversal of 76728653 is 35682767.

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, and also an emirpimes, since its reverse is a distinct semiprime: 35682767 = 31 ⋅1151057.

It is a cyclic number.

It is not a de Polignac number, because 76728653 - 2⁴ = 76728637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76728623) 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, 1208 + ... + 12446.

It is an arithmetic number, because the mean of its divisors is an integer number (19186680).

Almost surely, 2^76728653 is an apocalyptic number.

It is an amenable number.

76728653 is a deficient number, since it is larger than the sum of its proper divisors (18067).

76728653 is a wasteful number, since it uses less digits than its factorization.

76728653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18066.

The product of its digits is 423360, while the sum is 44.

The square root of 76728653 is about 8759.4893115980. The cubic root of 76728653 is about 424.9317592856.

The spelling of 76728653 in words is "seventy-six million, seven hundred twenty-eight thousand, six hundred fifty-three".