87978353 has 4 divisors (see below), whose sum is σ = 88259748. Its totient is φ = 87696960.

The previous prime is 87978347. The next prime is 87978367. The reversal of 87978353 is 35387978.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15864289 + 72114064 = 3983^2 + 8492^2 .

It is a cyclic number.

It is not a de Polignac number, because 87978353 - 2⁸ = 87978097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87978343) 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, 140228 + ... + 140853.

It is an arithmetic number, because the mean of its divisors is an integer number (22064937).

Almost surely, 2^87978353 is an apocalyptic number.

It is an amenable number.

87978353 is a deficient number, since it is larger than the sum of its proper divisors (281395).

87978353 is a wasteful number, since it uses less digits than its factorization.

87978353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281394.

The product of its digits is 1270080, while the sum is 50.

The square root of 87978353 is about 9379.6776597066. The cubic root of 87978353 is about 444.7595435343.

The spelling of 87978353 in words is "eighty-seven million, nine hundred seventy-eight thousand, three hundred fifty-three".