73642819 has 2 divisors, whose sum is σ = 73642820. Its totient is φ = 73642818.

The previous prime is 73642801. The next prime is 73642823. The reversal of 73642819 is 91824637.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 73642819 - 2⁵ = 73642787 is a prime.

It is a super-2 number, since 2×73642819² = 10846529580533522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (73642859) 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, 36821409 + 36821410.

It is an arithmetic number, because the mean of its divisors is an integer number (36821410).

Almost surely, 2^73642819 is an apocalyptic number.

73642819 is a deficient number, since it is larger than the sum of its proper divisors (1).

73642819 is an equidigital number, since it uses as much as digits as its factorization.

73642819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 40.

The square root of 73642819 is about 8581.5394306616. The cubic root of 73642819 is about 419.1570754753.

The spelling of 73642819 in words is "seventy-three million, six hundred forty-two thousand, eight hundred nineteen".