76720487 has 4 divisors (see below), whose sum is σ = 76738200. Its totient is φ = 76702776.

The previous prime is 76720481. The next prime is 76720513. The reversal of 76720487 is 78402767.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78402767 = 1193 ⋅65719.

It is a cyclic number.

It is not a de Polignac number, because 76720487 - 2¹⁶ = 76654951 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 (76720481) 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 3 ways as a sum of consecutive naturals, for example, 2468 + ... + 12630.

It is an arithmetic number, because the mean of its divisors is an integer number (19184550).

Almost surely, 2^76720487 is an apocalyptic number.

76720487 is a deficient number, since it is larger than the sum of its proper divisors (17713).

76720487 is a wasteful number, since it uses less digits than its factorization.

76720487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17712.

The product of its (nonzero) digits is 131712, while the sum is 41.

The square root of 76720487 is about 8759.0231761310. The cubic root of 76720487 is about 424.9166840140.

The spelling of 76720487 in words is "seventy-six million, seven hundred twenty thousand, four hundred eighty-seven".