103509481 has 4 divisors (see below), whose sum is σ = 109598292. Its totient is φ = 97420672.

The previous prime is 103509479. The next prime is 103509487. The reversal of 103509481 is 184905301.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 184905301 = 7 ⋅26415043.

It can be written as a sum of positive squares in 2 ways, for example, as 96353856 + 7155625 = 9816^2 + 2675^2 .

It is a cyclic number.

It is not a de Polignac number, because 103509481 - 2¹ = 103509479 is a prime.

It is a super-2 number, since 2×103509481² = 21428425313778722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (103509487) 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, 3044380 + ... + 3044413.

It is an arithmetic number, because the mean of its divisors is an integer number (27399573).

Almost surely, 2^103509481 is an apocalyptic number.

It is an amenable number.

103509481 is a deficient number, since it is larger than the sum of its proper divisors (6088811).

103509481 is an equidigital number, since it uses as much as digits as its factorization.

103509481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6088810.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 103509481 is about 10173.9609297461. The cubic root of 103509481 is about 469.5264295865.

The spelling of 103509481 in words is "one hundred three million, five hundred nine thousand, four hundred eighty-one".