43552987 has 4 divisors (see below), whose sum is σ = 43710496. Its totient is φ = 43395480.

The previous prime is 43552979. The next prime is 43553017. The reversal of 43552987 is 78925534.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78925534 = 2 ⋅39462767.

It is a cyclic number.

It is not a de Polignac number, because 43552987 - 2³ = 43552979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43552907) 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, 78339 + ... + 78892.

It is an arithmetic number, because the mean of its divisors is an integer number (10927624).

Almost surely, 2^43552987 is an apocalyptic number.

43552987 is a deficient number, since it is larger than the sum of its proper divisors (157509).

43552987 is a wasteful number, since it uses less digits than its factorization.

43552987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157508.

The product of its digits is 302400, while the sum is 43.

The square root of 43552987 is about 6599.4686907356. The cubic root of 43552987 is about 351.8352227866.

The spelling of 43552987 in words is "forty-three million, five hundred fifty-two thousand, nine hundred eighty-seven".