87974653 has 4 divisors (see below), whose sum is σ = 94741948. Its totient is φ = 81207360.

The previous prime is 87974639. The next prime is 87974699. The reversal of 87974653 is 35647978.

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 2 ways, for example, as 41434969 + 46539684 = 6437^2 + 6822^2 .

It is not a de Polignac number, because 87974653 - 2⁹ = 87974141 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87974597 and 87974606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87974153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3383628 + ... + 3383653.

It is an arithmetic number, because the mean of its divisors is an integer number (23685487).

Almost surely, 2^87974653 is an apocalyptic number.

It is an amenable number.

87974653 is a deficient number, since it is larger than the sum of its proper divisors (6767295).

87974653 is a wasteful number, since it uses less digits than its factorization.

87974653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6767294.

The product of its digits is 1270080, while the sum is 49.

The square root of 87974653 is about 9379.4804227100. The cubic root of 87974653 is about 444.7533085408.

The spelling of 87974653 in words is "eighty-seven million, nine hundred seventy-four thousand, six hundred fifty-three".