87453505 has 4 divisors (see below), whose sum is σ = 104944212. Its totient is φ = 69962800.

The previous prime is 87453503. The next prime is 87453547. The reversal of 87453505 is 50535478.

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 54287424 + 33166081 = 7368^2 + 5759^2 .

It is not a de Polignac number, because 87453505 - 2¹ = 87453503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87453503) 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, 8745346 + ... + 8745355.

It is an arithmetic number, because the mean of its divisors is an integer number (26236053).

Almost surely, 2^87453505 is an apocalyptic number.

It is an amenable number.

87453505 is a deficient number, since it is larger than the sum of its proper divisors (17490707).

87453505 is a wasteful number, since it uses less digits than its factorization.

87453505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17490706.

The product of its (nonzero) digits is 84000, while the sum is 37.

The square root of 87453505 is about 9351.6578744092. The cubic root of 87453505 is about 443.8733524695.

The spelling of 87453505 in words is "eighty-seven million, four hundred fifty-three thousand, five hundred five".