74405497 has 2 divisors, whose sum is σ = 74405498. Its totient is φ = 74405496.

The previous prime is 74405479. The next prime is 74405509. The reversal of 74405497 is 79450447.

Together with previous prime (74405479) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74287161 + 118336 = 8619^2 + 344^2 .

It is an emirp because it is prime and its reverse (79450447) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74405497 - 2⁷ = 74405369 is a prime.

It is not a weakly prime, because it can be changed into another prime (74405407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37202748 + 37202749.

It is an arithmetic number, because the mean of its divisors is an integer number (37202749).

Almost surely, 2^74405497 is an apocalyptic number.

It is an amenable number.

74405497 is a deficient number, since it is larger than the sum of its proper divisors (1).

74405497 is an equidigital number, since it uses as much as digits as its factorization.

74405497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141120, while the sum is 40.

The square root of 74405497 is about 8625.8621018423. The cubic root of 74405497 is about 420.5991015540.

The spelling of 74405497 in words is "seventy-four million, four hundred five thousand, four hundred ninety-seven".