73561449 has 16 divisors (see below), whose sum is σ = 106344000. Its totient is φ = 44961216.

The previous prime is 73561447. The next prime is 73561451. The reversal of 73561449 is 94416537.

It is an interprime number because it is at equal distance from previous prime (73561447) and next prime (73561451).

It is not a de Polignac number, because 73561449 - 2¹ = 73561447 is a prime.

It is a super-2 number, since 2×73561449² = 10822573557959202, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (73561447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 519 + ... + 12140.

It is an arithmetic number, because the mean of its divisors is an integer number (6646500).

Almost surely, 2^73561449 is an apocalyptic number.

It is an amenable number.

73561449 is a deficient number, since it is larger than the sum of its proper divisors (32782551).

73561449 is a wasteful number, since it uses less digits than its factorization.

73561449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12824.

The product of its digits is 90720, while the sum is 39.

The square root of 73561449 is about 8576.7971294651. The cubic root of 73561449 is about 419.0026391420.

The spelling of 73561449 in words is "seventy-three million, five hundred sixty-one thousand, four hundred forty-nine".