77016487 has 4 divisors (see below), whose sum is σ = 77044176. Its totient is φ = 76988800.

The previous prime is 77016479. The next prime is 77016497. The reversal of 77016487 is 78461077.

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

It is a cyclic number.

It is not a de Polignac number, because 77016487 - 2³ = 77016479 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 (77016497) 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, 9139 + ... + 15412.

It is an arithmetic number, because the mean of its divisors is an integer number (19261044).

Almost surely, 2^77016487 is an apocalyptic number.

77016487 is a deficient number, since it is larger than the sum of its proper divisors (27689).

77016487 is a wasteful number, since it uses less digits than its factorization.

77016487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27688.

The product of its (nonzero) digits is 65856, while the sum is 40.

The square root of 77016487 is about 8775.9037711224. The cubic root of 77016487 is about 425.4624484087.

The spelling of 77016487 in words is "seventy-seven million, sixteen thousand, four hundred eighty-seven".