73256657 has 4 divisors (see below), whose sum is σ = 73905060. Its totient is φ = 72608256.

The previous prime is 73256629. The next prime is 73256663. The reversal of 73256657 is 75665237.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75665237 = 137 ⋅552301.

It can be written as a sum of positive squares in 2 ways, for example, as 28313041 + 44943616 = 5321^2 + 6704^2 .

It is a cyclic number.

It is not a de Polignac number, because 73256657 - 2⁸ = 73256401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73256257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 324032 + ... + 324257.

It is an arithmetic number, because the mean of its divisors is an integer number (18476265).

Almost surely, 2^73256657 is an apocalyptic number.

It is an amenable number.

73256657 is a deficient number, since it is larger than the sum of its proper divisors (648403).

73256657 is a wasteful number, since it uses less digits than its factorization.

73256657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648402.

The product of its digits is 264600, while the sum is 41.

The square root of 73256657 is about 8559.0102815688. The cubic root of 73256657 is about 418.4231443003.

The spelling of 73256657 in words is "seventy-three million, two hundred fifty-six thousand, six hundred fifty-seven".