73845649 has 2 divisors, whose sum is σ = 73845650. Its totient is φ = 73845648.

The previous prime is 73845643. The next prime is 73845659. The reversal of 73845649 is 94654837.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72795024 + 1050625 = 8532^2 + 1025^2 .

It is a cyclic number.

It is not a de Polignac number, because 73845649 - 2³ = 73845641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 73845599 and 73845608.

It is not a weakly prime, because it can be changed into another prime (73845641) 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, 36922824 + 36922825.

It is an arithmetic number, because the mean of its divisors is an integer number (36922825).

Almost surely, 2^73845649 is an apocalyptic number.

It is an amenable number.

73845649 is a deficient number, since it is larger than the sum of its proper divisors (1).

73845649 is an equidigital number, since it uses as much as digits as its factorization.

73845649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 46.

The square root of 73845649 is about 8593.3491142860. The cubic root of 73845649 is about 419.5415424516.

The spelling of 73845649 in words is "seventy-three million, eight hundred forty-five thousand, six hundred forty-nine".