7491728047 has 2 divisors, whose sum is σ = 7491728048. Its totient is φ = 7491728046.

The previous prime is 7491728033. The next prime is 7491728051. The reversal of 7491728047 is 7408271947.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (7408271947) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7491728047 - 2¹¹ = 7491725999 is a prime.

It is a super-2 number, since 2×7491728047² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7491728947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3745864023 + 3745864024.

It is an arithmetic number, because the mean of its divisors is an integer number (3745864024).

Almost surely, 2^7491728047 is an apocalyptic number.

7491728047 is a deficient number, since it is larger than the sum of its proper divisors (1).

7491728047 is an equidigital number, since it uses as much as digits as its factorization.

7491728047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 790272, while the sum is 49.

The square root of 7491728047 is about 86554.7690598271. The cubic root of 7491728047 is about 1956.7139202730.

The spelling of 7491728047 in words is "seven billion, four hundred ninety-one million, seven hundred twenty-eight thousand, forty-seven".