74947471 has 4 divisors (see below), whose sum is σ = 74971744. Its totient is φ = 74923200.

The previous prime is 74947451. The next prime is 74947493. The reversal of 74947471 is 17474947.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17474947 = 7 ⋅2496421.

It is a cyclic number.

It is not a de Polignac number, because 74947471 - 2⁹ = 74946959 is a prime.

It is a super-3 number, since 3×74947471³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74947451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6690 + ... + 13951.

It is an arithmetic number, because the mean of its divisors is an integer number (18742936).

Almost surely, 2^74947471 is an apocalyptic number.

74947471 is a deficient number, since it is larger than the sum of its proper divisors (24273).

74947471 is a wasteful number, since it uses less digits than its factorization.

74947471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24272.

The product of its digits is 197568, while the sum is 43.

The square root of 74947471 is about 8657.2207434026. The cubic root of 74947471 is about 421.6178548243.

The spelling of 74947471 in words is "seventy-four million, nine hundred forty-seven thousand, four hundred seventy-one".