87454478 has 4 divisors (see below), whose sum is σ = 131181720. Its totient is φ = 43727238.

The previous prime is 87454469. The next prime is 87454481. The reversal of 87454478 is 87445478.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87445478 = 2 ⋅43722739.

It is a super-3 number, since 3×87454478³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21863618 + ... + 21863621.

It is an arithmetic number, because the mean of its divisors is an integer number (32795430).

Almost surely, 2^87454478 is an apocalyptic number.

87454478 is a deficient number, since it is larger than the sum of its proper divisors (43727242).

87454478 is a wasteful number, since it uses less digits than its factorization.

87454478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43727241.

The product of its digits is 1003520, while the sum is 47.

The square root of 87454478 is about 9351.7098971258. The cubic root of 87454478 is about 443.8749986287.

The spelling of 87454478 in words is "eighty-seven million, four hundred fifty-four thousand, four hundred seventy-eight".