74561819 has 2 divisors, whose sum is σ = 74561820. Its totient is φ = 74561818.

The previous prime is 74561801. The next prime is 74561869. The reversal of 74561819 is 91816547.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 74561819 - 2²⁰ = 73513243 is a prime.

It is a super-2 number, since 2×74561819² = 11118929705177522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (74561869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37280909 + 37280910.

It is an arithmetic number, because the mean of its divisors is an integer number (37280910).

Almost surely, 2^74561819 is an apocalyptic number.

74561819 is a deficient number, since it is larger than the sum of its proper divisors (1).

74561819 is an equidigital number, since it uses as much as digits as its factorization.

74561819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 41.

The square root of 74561819 is about 8634.9185867615. The cubic root of 74561819 is about 420.8934476445.

The spelling of 74561819 in words is "seventy-four million, five hundred sixty-one thousand, eight hundred nineteen".