7217472839 has 2 divisors, whose sum is σ = 7217472840. Its totient is φ = 7217472838.

The previous prime is 7217472803. The next prime is 7217472853. The reversal of 7217472839 is 9382747127.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7217472839 - 2¹⁶ = 7217407303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7217472439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3608736419 + 3608736420.

It is an arithmetic number, because the mean of its divisors is an integer number (3608736420).

Almost surely, 2^7217472839 is an apocalyptic number.

7217472839 is a deficient number, since it is larger than the sum of its proper divisors (1).

7217472839 is an equidigital number, since it uses as much as digits as its factorization.

7217472839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1185408, while the sum is 50.

The square root of 7217472839 is about 84955.7110440493. The cubic root of 7217472839 is about 1932.5395296242.

The spelling of 7217472839 in words is "seven billion, two hundred seventeen million, four hundred seventy-two thousand, eight hundred thirty-nine".