87772613 has 4 divisors (see below), whose sum is σ = 89082720. Its totient is φ = 86462508.

The previous prime is 87772591. The next prime is 87772673. The reversal of 87772613 is 31627778.

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.

It is a cyclic number.

It is not a de Polignac number, because 87772613 - 2¹⁰ = 87771589 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 (87772673) 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, 654953 + ... + 655086.

It is an arithmetic number, because the mean of its divisors is an integer number (22270680).

Almost surely, 2^87772613 is an apocalyptic number.

It is an amenable number.

87772613 is a deficient number, since it is larger than the sum of its proper divisors (1310107).

87772613 is a wasteful number, since it uses less digits than its factorization.

87772613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1310106.

The product of its digits is 98784, while the sum is 41.

The square root of 87772613 is about 9368.7039124950. The cubic root of 87772613 is about 444.4125784491.

The spelling of 87772613 in words is "eighty-seven million, seven hundred seventy-two thousand, six hundred thirteen".