73679861 has 2 divisors, whose sum is σ = 73679862. Its totient is φ = 73679860.

The previous prime is 73679857. The next prime is 73679863. The reversal of 73679861 is 16897637.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60357361 + 13322500 = 7769^2 + 3650^2 .

It is a cyclic number.

It is not a de Polignac number, because 73679861 - 2² = 73679857 is a prime.

Together with 73679863, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73679863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36839930 + 36839931.

It is an arithmetic number, because the mean of its divisors is an integer number (36839931).

Almost surely, 2^73679861 is an apocalyptic number.

It is an amenable number.

73679861 is a deficient number, since it is larger than the sum of its proper divisors (1).

73679861 is an equidigital number, since it uses as much as digits as its factorization.

73679861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 381024, while the sum is 47.

The square root of 73679861 is about 8583.6973968098. The cubic root of 73679861 is about 419.2273417238.

The spelling of 73679861 in words is "seventy-three million, six hundred seventy-nine thousand, eight hundred sixty-one".