7893729149 has 2 divisors, whose sum is σ = 7893729150. Its totient is φ = 7893729148.

The previous prime is 7893729079. The next prime is 7893729163. The reversal of 7893729149 is 9419273987.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4986901924 + 2906827225 = 70618^2 + 53915^2 .

It is an emirp because it is prime and its reverse (9419273987) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7893729149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7893729169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3946864574 + 3946864575.

It is an arithmetic number, because the mean of its divisors is an integer number (3946864575).

Almost surely, 2^7893729149 is an apocalyptic number.

It is an amenable number.

7893729149 is a deficient number, since it is larger than the sum of its proper divisors (1).

7893729149 is an equidigital number, since it uses as much as digits as its factorization.

7893729149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6858432, while the sum is 59.

The square root of 7893729149 is about 88846.6608770414. The cubic root of 7893729149 is about 1991.1045902492.

The spelling of 7893729149 in words is "seven billion, eight hundred ninety-three million, seven hundred twenty-nine thousand, one hundred forty-nine".