73725857 has 4 divisors (see below), whose sum is σ = 73862676. Its totient is φ = 73589040.

The previous prime is 73725851. The next prime is 73725877. The reversal of 73725857 is 75852737.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 44609041 + 29116816 = 6679^2 + 5396^2 .

It is a cyclic number.

It is not a de Polignac number, because 73725857 - 2⁸ = 73725601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73725851) 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, 67598 + ... + 68679.

It is an arithmetic number, because the mean of its divisors is an integer number (18465669).

Almost surely, 2^73725857 is an apocalyptic number.

It is an amenable number.

73725857 is a deficient number, since it is larger than the sum of its proper divisors (136819).

73725857 is a wasteful number, since it uses less digits than its factorization.

73725857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136818.

The product of its digits is 411600, while the sum is 44.

The square root of 73725857 is about 8586.3762437946. The cubic root of 73725857 is about 419.3145603541.

The spelling of 73725857 in words is "seventy-three million, seven hundred twenty-five thousand, eight hundred fifty-seven".