1721492073 has 24 divisors (see below), whose sum is σ = 2843880000. Its totient is φ = 982999584.

The previous prime is 1721491987. The next prime is 1721492083. The reversal of 1721492073 is 3702941271.

It is not a de Polignac number, because 1721492073 - 2²⁰ = 1720443497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1721492083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85323 + ... + 103551.

It is an arithmetic number, because the mean of its divisors is an integer number (118495000).

Almost surely, 2^1721492073 is an apocalyptic number.

It is an amenable number.

1721492073 is a deficient number, since it is larger than the sum of its proper divisors (1122387927).

1721492073 is a wasteful number, since it uses less digits than its factorization.

1721492073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19741 (or 19738 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 1721492073 is about 41490.8673445133. The cubic root of 1721492073 is about 1198.4916402534.

The spelling of 1721492073 in words is "one billion, seven hundred twenty-one million, four hundred ninety-two thousand, seventy-three".