803528981 has 4 divisors (see below), whose sum is σ = 845820000. Its totient is φ = 761237964.

The previous prime is 803528977. The next prime is 803529011. The reversal of 803528981 is 189825308.

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 not a de Polignac number, because 803528981 - 2² = 803528977 is a prime.

It is a super-2 number, since 2×803528981² = 1291317646613796722, 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 (803528911) 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, 21145481 + ... + 21145518.

It is an arithmetic number, because the mean of its divisors is an integer number (211455000).

Almost surely, 2^803528981 is an apocalyptic number.

It is an amenable number.

803528981 is a deficient number, since it is larger than the sum of its proper divisors (42291019).

803528981 is a wasteful number, since it uses less digits than its factorization.

803528981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42291018.

The product of its (nonzero) digits is 138240, while the sum is 44.

The square root of 803528981 is about 28346.5867610194. The cubic root of 803528981 is about 929.6807710763.

The spelling of 803528981 in words is "eight hundred three million, five hundred twenty-eight thousand, nine hundred eighty-one".