74545819 has 2 divisors, whose sum is σ = 74545820. Its totient is φ = 74545818.

The previous prime is 74545817. The next prime is 74545837. The reversal of 74545819 is 91854547.

It is a weak prime.

It is an emirp because it is prime and its reverse (91854547) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74545819 - 2¹ = 74545817 is a prime.

It is a super-2 number, since 2×74545819² = 11114158260761522, which contains 22 as substring.

Together with 74545817, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (74545817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37272909 + 37272910.

It is an arithmetic number, because the mean of its divisors is an integer number (37272910).

Almost surely, 2^74545819 is an apocalyptic number.

74545819 is a deficient number, since it is larger than the sum of its proper divisors (1).

74545819 is an equidigital number, since it uses as much as digits as its factorization.

74545819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 201600, while the sum is 43.

The square root of 74545819 is about 8633.9920662461. The cubic root of 74545819 is about 420.8633393978.

It can be divided in two parts, 745 and 45819, that added together give a palindrome (46564).

The spelling of 74545819 in words is "seventy-four million, five hundred forty-five thousand, eight hundred nineteen".