87787489 has 8 divisors (see below), whose sum is σ = 88426208. Its totient is φ = 87151680.

The previous prime is 87787477. The next prime is 87787499. The reversal of 87787489 is 98478778.

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 87787489 - 2¹¹ = 87785441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87787409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111154 + ... + 111940.

It is an arithmetic number, because the mean of its divisors is an integer number (11053276).

Almost surely, 2^87787489 is an apocalyptic number.

It is an amenable number.

87787489 is a deficient number, since it is larger than the sum of its proper divisors (638719).

87787489 is a wasteful number, since it uses less digits than its factorization.

87787489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1455.

The product of its digits is 6322176, while the sum is 58.

The square root of 87787489 is about 9369.4977987083. The cubic root of 87787489 is about 444.4376838810.

The spelling of 87787489 in words is "eighty-seven million, seven hundred eighty-seven thousand, four hundred eighty-nine".