87773649 has 4 divisors (see below), whose sum is σ = 117031536. Its totient is φ = 58515764.

The previous prime is 87773641. The next prime is 87773659. The reversal of 87773649 is 94637778.

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 87773649 - 2³ = 87773641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87773641) 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, 14628939 + ... + 14628944.

It is an arithmetic number, because the mean of its divisors is an integer number (29257884).

Almost surely, 2^87773649 is an apocalyptic number.

It is an amenable number.

87773649 is a deficient number, since it is larger than the sum of its proper divisors (29257887).

87773649 is a wasteful number, since it uses less digits than its factorization.

87773649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29257886.

The product of its digits is 1778112, while the sum is 51.

The square root of 87773649 is about 9368.7592027973. The cubic root of 87773649 is about 444.4143269429.

The spelling of 87773649 in words is "eighty-seven million, seven hundred seventy-three thousand, six hundred forty-nine".