73872565 has 16 divisors (see below), whose sum is σ = 101083248. Its totient is φ = 51342336.

The previous prime is 73872521. The next prime is 73872587. The reversal of 73872565 is 56527837.

It can be written as a sum of positive squares in 8 ways, for example, as 3161284 + 70711281 = 1778^2 + 8409^2 .

It is a cyclic number.

It is not a de Polignac number, because 73872565 - 2⁹ = 73872053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32322 + ... + 34531.

It is an arithmetic number, because the mean of its divisors is an integer number (6317703).

Almost surely, 2^73872565 is an apocalyptic number.

It is an amenable number.

73872565 is a deficient number, since it is larger than the sum of its proper divisors (27210683).

73872565 is a wasteful number, since it uses less digits than its factorization.

73872565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66888.

The product of its digits is 352800, while the sum is 43.

The square root of 73872565 is about 8594.9150664797. The cubic root of 73872565 is about 419.5925091576.

The spelling of 73872565 in words is "seventy-three million, eight hundred seventy-two thousand, five hundred sixty-five".