8503981 has 4 divisors (see below), whose sum is σ = 8701792. Its totient is φ = 8306172.

The previous prime is 8503973. The next prime is 8503991. The reversal of 8503981 is 1893058.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8503981 - 2³ = 8503973 is a prime.

It is a super-2 number, since 2×8503981² = 144635385696722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8503991) 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, 98841 + ... + 98926.

It is an arithmetic number, because the mean of its divisors is an integer number (2175448).

Almost surely, 2^8503981 is an apocalyptic number.

It is an amenable number.

8503981 is a deficient number, since it is larger than the sum of its proper divisors (197811).

8503981 is a wasteful number, since it uses less digits than its factorization.

8503981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197810.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 8503981 is about 2916.1586033685. The cubic root of 8503981 is about 204.1146110426.

The spelling of 8503981 in words is "eight million, five hundred three thousand, nine hundred eighty-one".