74917871947 has 4 divisors (see below), whose sum is σ = 75866199520. Its totient is φ = 73969544376.

The previous prime is 74917871939. The next prime is 74917871971.

74917871947 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 74917871947 - 2³ = 74917871939 is a prime.

It is a super-2 number, since 2×74917871947² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74917871927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 474163668 + ... + 474163825.

It is an arithmetic number, because the mean of its divisors is an integer number (18966549880).

Almost surely, 2^74917871947 is an apocalyptic number.

74917871947 is a deficient number, since it is larger than the sum of its proper divisors (948327573).

74917871947 is an equidigital number, since it uses as much as digits as its factorization.

74917871947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 948327572.

The product of its digits is 24893568, while the sum is 64.

The spelling of 74917871947 in words is "seventy-four billion, nine hundred seventeen million, eight hundred seventy-one thousand, nine hundred forty-seven".