87842455 has 4 divisors (see below), whose sum is σ = 105410952. Its totient is φ = 70273960.

The previous prime is 87842449. The next prime is 87842467. The reversal of 87842455 is 55424878.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55424878 = 2 ⋅27712439.

It is not a de Polignac number, because 87842455 - 2⁵ = 87842423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8784241 + ... + 8784250.

It is an arithmetic number, because the mean of its divisors is an integer number (26352738).

Almost surely, 2^87842455 is an apocalyptic number.

87842455 is a deficient number, since it is larger than the sum of its proper divisors (17568497).

87842455 is a wasteful number, since it uses less digits than its factorization.

87842455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17568496.

The product of its digits is 358400, while the sum is 43.

The square root of 87842455 is about 9372.4305812313. The cubic root of 87842455 is about 444.5304224752.

The spelling of 87842455 in words is "eighty-seven million, eight hundred forty-two thousand, four hundred fifty-five".