7421943317 has 4 divisors (see below), whose sum is σ = 7858528236. Its totient is φ = 6985358400.

The previous prime is 7421943313. The next prime is 7421943329. The reversal of 7421943317 is 7133491247.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7133491247 = 349 ⋅20439803.

It can be written as a sum of positive squares in 2 ways, for example, as 5352239281 + 2069704036 = 73159^2 + 45494^2 .

It is a cyclic number.

It is not a de Polignac number, because 7421943317 - 2² = 7421943313 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7421943313) 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, 218292434 + ... + 218292467.

It is an arithmetic number, because the mean of its divisors is an integer number (1964632059).

Almost surely, 2^7421943317 is an apocalyptic number.

It is an amenable number.

7421943317 is a deficient number, since it is larger than the sum of its proper divisors (436584919).

7421943317 is a wasteful number, since it uses less digits than its factorization.

7421943317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436584918.

The product of its digits is 127008, while the sum is 41.

The square root of 7421943317 is about 86150.7011985393. The cubic root of 7421943317 is about 1950.6194233796.

The spelling of 7421943317 in words is "seven billion, four hundred twenty-one million, nine hundred forty-three thousand, three hundred seventeen".