7420642247 has 2 divisors, whose sum is σ = 7420642248. Its totient is φ = 7420642246.

The previous prime is 7420642219. The next prime is 7420642303. The reversal of 7420642247 is 7422460247.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7420642247 - 2¹⁸ = 7420380103 is a prime.

It is a super-2 number, since 2×7420642247² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7420642247.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7420642217) 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 as a sum of consecutive naturals, namely, 3710321123 + 3710321124.

It is an arithmetic number, because the mean of its divisors is an integer number (3710321124).

Almost surely, 2^7420642247 is an apocalyptic number.

7420642247 is a deficient number, since it is larger than the sum of its proper divisors (1).

7420642247 is an equidigital number, since it uses as much as digits as its factorization.

7420642247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 150528, while the sum is 38.

The square root of 7420642247 is about 86143.1497392567. The cubic root of 7420642247 is about 1950.5054352314.

The spelling of 7420642247 in words is "seven billion, four hundred twenty million, six hundred forty-two thousand, two hundred forty-seven".