87633677 has 4 divisors (see below), whose sum is σ = 88078716. Its totient is φ = 87188640.

The previous prime is 87633671. The next prime is 87633697. The reversal of 87633677 is 77633678.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77633678 = 2 ⋅38816839.

It can be written as a sum of positive squares in 2 ways, for example, as 75446596 + 12187081 = 8686^2 + 3491^2 .

It is a cyclic number.

It is not a de Polignac number, because 87633677 - 2¹⁴ = 87617293 is a prime.

It is a super-2 number, since 2×87633677² = 15359322689080658, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87633671) 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, 222224 + ... + 222617.

It is an arithmetic number, because the mean of its divisors is an integer number (22019679).

Almost surely, 2^87633677 is an apocalyptic number.

It is an amenable number.

87633677 is a deficient number, since it is larger than the sum of its proper divisors (445039).

87633677 is a wasteful number, since it uses less digits than its factorization.

87633677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445038.

The product of its digits is 889056, while the sum is 47.

The square root of 87633677 is about 9361.2860761756. The cubic root of 87633677 is about 444.1779664921.

Subtracting from 87633677 its reverse (77633678), we obtain a palindrome (9999999).

The spelling of 87633677 in words is "eighty-seven million, six hundred thirty-three thousand, six hundred seventy-seven".