74428171 has 2 divisors, whose sum is σ = 74428172. Its totient is φ = 74428170.

The previous prime is 74428163. The next prime is 74428177. The reversal of 74428171 is 17182447.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 74428171 - 2³ = 74428163 is a prime.

It is a super-3 number, since 3×74428171³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (74428177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37214085 + 37214086.

It is an arithmetic number, because the mean of its divisors is an integer number (37214086).

Almost surely, 2^74428171 is an apocalyptic number.

74428171 is a deficient number, since it is larger than the sum of its proper divisors (1).

74428171 is an equidigital number, since it uses as much as digits as its factorization.

74428171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12544, while the sum is 34.

The square root of 74428171 is about 8627.1763051418. The cubic root of 74428171 is about 420.6418210477.

The spelling of 74428171 in words is "seventy-four million, four hundred twenty-eight thousand, one hundred seventy-one".