74523457 has 2 divisors, whose sum is σ = 74523458. Its totient is φ = 74523456.

The previous prime is 74523433. The next prime is 74523503. The reversal of 74523457 is 75432547.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57017601 + 17505856 = 7551^2 + 4184^2 .

It is an emirp because it is prime and its reverse (75432547) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74523457 is a prime.

It is not a weakly prime, because it can be changed into another prime (74526457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37261728 + 37261729.

It is an arithmetic number, because the mean of its divisors is an integer number (37261729).

Almost surely, 2^74523457 is an apocalyptic number.

It is an amenable number.

74523457 is a deficient number, since it is larger than the sum of its proper divisors (1).

74523457 is an equidigital number, since it uses as much as digits as its factorization.

74523457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 117600, while the sum is 37.

The square root of 74523457 is about 8632.6969713989. The cubic root of 74523457 is about 420.8212521404.

The spelling of 74523457 in words is "seventy-four million, five hundred twenty-three thousand, four hundred fifty-seven".