74274247247 has 4 divisors (see below), whose sum is σ = 74287898520. Its totient is φ = 74260595976.

The previous prime is 74274247163. The next prime is 74274247249.

74274247247 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 74274247247 - 2¹⁶ = 74274181711 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74274247195 and 74274247204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74274247249) 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, 6817472 + ... + 6828357.

It is an arithmetic number, because the mean of its divisors is an integer number (18571974630).

Almost surely, 2^74274247247 is an apocalyptic number.

74274247247 is a deficient number, since it is larger than the sum of its proper divisors (13651273).

74274247247 is a wasteful number, since it uses less digits than its factorization.

74274247247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13651272.

The product of its digits is 4917248, while the sum is 50.

The spelling of 74274247247 in words is "seventy-four billion, two hundred seventy-four million, two hundred forty-seven thousand, two hundred forty-seven".