74420897 has 2 divisors, whose sum is σ = 74420898. Its totient is φ = 74420896.

The previous prime is 74420869. The next prime is 74420953. The reversal of 74420897 is 79802447.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46022656 + 28398241 = 6784^2 + 5329^2 .

It is an emirp because it is prime and its reverse (79802447) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74420897 - 2¹² = 74416801 is a prime.

It is not a weakly prime, because it can be changed into another prime (74420807) 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, 37210448 + 37210449.

It is an arithmetic number, because the mean of its divisors is an integer number (37210449).

Almost surely, 2^74420897 is an apocalyptic number.

It is an amenable number.

74420897 is a deficient number, since it is larger than the sum of its proper divisors (1).

74420897 is an equidigital number, since it uses as much as digits as its factorization.

74420897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 74420897 is about 8626.7547200555. The cubic root of 74420897 is about 420.6281172388.

The spelling of 74420897 in words is "seventy-four million, four hundred twenty thousand, eight hundred ninety-seven".