73143665 has 16 divisors (see below), whose sum is σ = 100459008. Its totient is φ = 50081856.

The previous prime is 73143661. The next prime is 73143701. The reversal of 73143665 is 56634137.

It is a cyclic number.

It is not a de Polignac number, because 73143665 - 2² = 73143661 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73143661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34424 + ... + 36486.

It is an arithmetic number, because the mean of its divisors is an integer number (6278688).

Almost surely, 2^73143665 is an apocalyptic number.

It is an amenable number.

73143665 is a deficient number, since it is larger than the sum of its proper divisors (27315343).

73143665 is a wasteful number, since it uses less digits than its factorization.

73143665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3088.

The product of its digits is 45360, while the sum is 35.

The square root of 73143665 is about 8552.4069711398. The cubic root of 73143665 is about 418.2079065396.

The spelling of 73143665 in words is "seventy-three million, one hundred forty-three thousand, six hundred sixty-five".