87990353 has 12 divisors (see below), whose sum is σ = 97162884. Its totient is φ = 79622400.

The previous prime is 87990277. The next prime is 87990361. The reversal of 87990353 is 35309978.

It can be written as a sum of positive squares in 2 ways, for example, as 5234944 + 82755409 = 2288^2 + 9097^2 .

It is not a de Polignac number, because 87990353 - 2¹² = 87986257 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (87980353) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26633 + ... + 29753.

It is an arithmetic number, because the mean of its divisors is an integer number (8096907).

Almost surely, 2^87990353 is an apocalyptic number.

It is an amenable number.

87990353 is a deficient number, since it is larger than the sum of its proper divisors (9172531).

87990353 is a wasteful number, since it uses less digits than its factorization.

87990353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3376 (or 3365 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 87990353 is about 9380.3173187265. The cubic root of 87990353 is about 444.7797639321.

The spelling of 87990353 in words is "eighty-seven million, nine hundred ninety thousand, three hundred fifty-three".