1403324661 has 4 divisors (see below), whose sum is σ = 1871099552. Its totient is φ = 935549772.

The previous prime is 1403324623. The next prime is 1403324693. The reversal of 1403324661 is 1664233041.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1664233041 = 3 ⋅554744347.

It is not a de Polignac number, because 1403324661 - 2⁹ = 1403324149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1403324861) 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, 233887441 + ... + 233887446.

It is an arithmetic number, because the mean of its divisors is an integer number (467774888).

Almost surely, 2^1403324661 is an apocalyptic number.

It is an amenable number.

1403324661 is a deficient number, since it is larger than the sum of its proper divisors (467774891).

1403324661 is an equidigital number, since it uses as much as digits as its factorization.

1403324661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467774890.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 1403324661 is about 37460.9751741729. The cubic root of 1403324661 is about 1119.5737804766.

The spelling of 1403324661 in words is "one billion, four hundred three million, three hundred twenty-four thousand, six hundred sixty-one".