73199745 has 24 divisors (see below), whose sum is σ = 127309416. Its totient is φ = 38907648.

The previous prime is 73199729. The next prime is 73199767. The reversal of 73199745 is 54799137.

It can be written as a sum of positive squares in 4 ways, for example, as 199809 + 72999936 = 447^2 + 8544^2 .

It is not a de Polignac number, because 73199745 - 2⁴ = 73199729 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 73199745.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11487 + ... + 16683.

It is an arithmetic number, because the mean of its divisors is an integer number (5304559).

Almost surely, 2^73199745 is an apocalyptic number.

It is an amenable number.

73199745 is a deficient number, since it is larger than the sum of its proper divisors (54109671).

73199745 is a wasteful number, since it uses less digits than its factorization.

73199745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5521 (or 5518 counting only the distinct ones).

The product of its digits is 238140, while the sum is 45.

The square root of 73199745 is about 8555.6849521239. The cubic root of 73199745 is about 418.3147606695.

The spelling of 73199745 in words is "seventy-three million, one hundred ninety-nine thousand, seven hundred forty-five".