87784946 has 4 divisors (see below), whose sum is σ = 131677422. Its totient is φ = 43892472.

The previous prime is 87784933. The next prime is 87784993. The reversal of 87784946 is 64948778.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64948778 = 2 ⋅32474389.

It can be written as a sum of positive squares in only one way, i.e., 58354321 + 29430625 = 7639^2 + 5425^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21946235 + ... + 21946238.

Almost surely, 2^87784946 is an apocalyptic number.

87784946 is a deficient number, since it is larger than the sum of its proper divisors (43892476).

87784946 is a wasteful number, since it uses less digits than its factorization.

87784946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43892475.

The product of its digits is 2709504, while the sum is 53.

The square root of 87784946 is about 9369.3620914126. The cubic root of 87784946 is about 444.4333923965.

The spelling of 87784946 in words is "eighty-seven million, seven hundred eighty-four thousand, nine hundred forty-six".