73743561 has 8 divisors (see below), whose sum is σ = 109249760. Its totient is φ = 49162356.

The previous prime is 73743559. The next prime is 73743587. The reversal of 73743561 is 16534737.

It is not a de Polignac number, because 73743561 - 2¹ = 73743559 is a prime.

It is a super-2 number, since 2×73743561² = 10876225577921442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73743521) 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 7 ways as a sum of consecutive naturals, for example, 1365595 + ... + 1365648.

It is an arithmetic number, because the mean of its divisors is an integer number (13656220).

Almost surely, 2^73743561 is an apocalyptic number.

It is an amenable number.

73743561 is a deficient number, since it is larger than the sum of its proper divisors (35506199).

73743561 is a wasteful number, since it uses less digits than its factorization.

73743561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2731252 (or 2731246 counting only the distinct ones).

The product of its digits is 52920, while the sum is 36.

The square root of 73743561 is about 8587.4071174016. The cubic root of 73743561 is about 419.3481214010.

The spelling of 73743561 in words is "seventy-three million, seven hundred forty-three thousand, five hundred sixty-one".