73679813 has 2 divisors, whose sum is σ = 73679814. Its totient is φ = 73679812.

The previous prime is 73679791. The next prime is 73679821. The reversal of 73679813 is 31897637.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49098049 + 24581764 = 7007^2 + 4958^2 .

It is a cyclic number.

It is not a de Polignac number, because 73679813 - 2²² = 69485509 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73679843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36839906 + 36839907.

It is an arithmetic number, because the mean of its divisors is an integer number (36839907).

Almost surely, 2^73679813 is an apocalyptic number.

It is an amenable number.

73679813 is a deficient number, since it is larger than the sum of its proper divisors (1).

73679813 is an equidigital number, since it uses as much as digits as its factorization.

73679813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 44.

The square root of 73679813 is about 8583.6946008115. The cubic root of 73679813 is about 419.2272506862.

The spelling of 73679813 in words is "seventy-three million, six hundred seventy-nine thousand, eight hundred thirteen".