74649517 has 2 divisors, whose sum is σ = 74649518. Its totient is φ = 74649516.

The previous prime is 74649511. The next prime is 74649521. The reversal of 74649517 is 71594647.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44903401 + 29746116 = 6701^2 + 5454^2 .

It is an emirp because it is prime and its reverse (71594647) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74649517 - 2¹⁵ = 74616749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74649511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37324758 + 37324759.

It is an arithmetic number, because the mean of its divisors is an integer number (37324759).

Almost surely, 2^74649517 is an apocalyptic number.

It is an amenable number.

74649517 is a deficient number, since it is larger than the sum of its proper divisors (1).

74649517 is an equidigital number, since it uses as much as digits as its factorization.

74649517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211680, while the sum is 43.

The square root of 74649517 is about 8639.9951967579. The cubic root of 74649517 is about 421.0583982497.

The spelling of 74649517 in words is "seventy-four million, six hundred forty-nine thousand, five hundred seventeen".