87553442 has 4 divisors (see below), whose sum is σ = 131330166. Its totient is φ = 43776720.

The previous prime is 87553441. The next prime is 87553447. The reversal of 87553442 is 24435578.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 45576001 + 41977441 = 6751^2 + 6479^2 .

It is a junction number, because it is equal to n+sod(n) for n = 87553396 and 87553405.

It is not an unprimeable number, because it can be changed into a prime (87553441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21888359 + ... + 21888362.

Almost surely, 2^87553442 is an apocalyptic number.

87553442 is a deficient number, since it is larger than the sum of its proper divisors (43776724).

87553442 is a wasteful number, since it uses less digits than its factorization.

87553442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43776723.

The product of its digits is 134400, while the sum is 38.

The square root of 87553442 is about 9356.9996259485. Note that the first 3 decimals coincide. The cubic root of 87553442 is about 444.0423660301.

The spelling of 87553442 in words is "eighty-seven million, five hundred fifty-three thousand, four hundred forty-two".