74974187 has 2 divisors, whose sum is σ = 74974188. Its totient is φ = 74974186.

The previous prime is 74974169. The next prime is 74974217. The reversal of 74974187 is 78147947.

It is a weak prime.

It is an emirp because it is prime and its reverse (78147947) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74974187 - 2¹⁴ = 74957803 is a prime.

It is a super-2 number, since 2×74974187² = 11242257432621938, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (74974127) 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, 37487093 + 37487094.

It is an arithmetic number, because the mean of its divisors is an integer number (37487094).

Almost surely, 2^74974187 is an apocalyptic number.

74974187 is a deficient number, since it is larger than the sum of its proper divisors (1).

74974187 is an equidigital number, since it uses as much as digits as its factorization.

74974187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 395136, while the sum is 47.

The square root of 74974187 is about 8658.7635953408. The cubic root of 74974187 is about 421.6679459273.

The spelling of 74974187 in words is "seventy-four million, nine hundred seventy-four thousand, one hundred eighty-seven".