7316717321 has 4 divisors (see below), whose sum is σ = 7317844500. Its totient is φ = 7315590144.

The previous prime is 7316717299. The next prime is 7316717327. The reversal of 7316717321 is 1237176137.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1237176137 = 491 ⋅2519707.

It can be written as a sum of positive squares in 2 ways, for example, as 187279225 + 7129438096 = 13685^2 + 84436^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7316717321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7316717327) 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, 553796 + ... + 566853.

It is an arithmetic number, because the mean of its divisors is an integer number (1829461125).

Almost surely, 2^7316717321 is an apocalyptic number.

It is an amenable number.

7316717321 is a deficient number, since it is larger than the sum of its proper divisors (1127179).

7316717321 is a wasteful number, since it uses less digits than its factorization.

7316717321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1127178.

The product of its digits is 37044, while the sum is 38.

The square root of 7316717321 is about 85537.8122294462. The cubic root of 7316717321 is about 1941.3570871763.

The spelling of 7316717321 in words is "seven billion, three hundred sixteen million, seven hundred seventeen thousand, three hundred twenty-one".