73640873 has 2 divisors, whose sum is σ = 73640874. Its totient is φ = 73640872.

The previous prime is 73640851. The next prime is 73640881. The reversal of 73640873 is 37804637.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61889689 + 11751184 = 7867^2 + 3428^2 .

It is a cyclic number.

It is not a de Polignac number, because 73640873 - 2²² = 69446569 is a prime.

It is not a weakly prime, because it can be changed into another prime (73640803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36820436 + 36820437.

It is an arithmetic number, because the mean of its divisors is an integer number (36820437).

Almost surely, 2^73640873 is an apocalyptic number.

It is an amenable number.

73640873 is a deficient number, since it is larger than the sum of its proper divisors (1).

73640873 is an equidigital number, since it uses as much as digits as its factorization.

73640873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 38.

The square root of 73640873 is about 8581.4260469924. The cubic root of 73640873 is about 419.1533833893.

The spelling of 73640873 in words is "seventy-three million, six hundred forty thousand, eight hundred seventy-three".