87353557 has 4 divisors (see below), whose sum is σ = 87490476. Its totient is φ = 87216640.

The previous prime is 87353549. The next prime is 87353561. The reversal of 87353557 is 75535378.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75535378 = 2 ⋅37767689.

It can be written as a sum of positive squares in 2 ways, for example, as 74494161 + 12859396 = 8631^2 + 3586^2 .

It is a cyclic number.

It is not a de Polignac number, because 87353557 - 2³ = 87353549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87353527) 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, 67498 + ... + 68779.

It is an arithmetic number, because the mean of its divisors is an integer number (21872619).

Almost surely, 2^87353557 is an apocalyptic number.

It is an amenable number.

87353557 is a deficient number, since it is larger than the sum of its proper divisors (136919).

87353557 is a wasteful number, since it uses less digits than its factorization.

87353557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136918.

The product of its digits is 441000, while the sum is 43.

The square root of 87353557 is about 9346.3124814014. The cubic root of 87353557 is about 443.7041914758.

The spelling of 87353557 in words is "eighty-seven million, three hundred fifty-three thousand, five hundred fifty-seven".