73906813 has 2 divisors, whose sum is σ = 73906814. Its totient is φ = 73906812.

The previous prime is 73906801. The next prime is 73906853. The reversal of 73906813 is 31860937.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64432729 + 9474084 = 8027^2 + 3078^2 .

It is a cyclic number.

It is not a de Polignac number, because 73906813 - 2²⁵ = 40352381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73906853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36953406 + 36953407.

It is an arithmetic number, because the mean of its divisors is an integer number (36953407).

Almost surely, 2^73906813 is an apocalyptic number.

It is an amenable number.

73906813 is a deficient number, since it is larger than the sum of its proper divisors (1).

73906813 is an equidigital number, since it uses as much as digits as its factorization.

73906813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 73906813 is about 8596.9071764211. The cubic root of 73906813 is about 419.6573414541.

The spelling of 73906813 in words is "seventy-three million, nine hundred six thousand, eight hundred thirteen".