7139729137 has 2 divisors, whose sum is σ = 7139729138. Its totient is φ = 7139729136.

The previous prime is 7139729131. The next prime is 7139729141. The reversal of 7139729137 is 7319279317.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5454708736 + 1685020401 = 73856^2 + 41049^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7139729137 is a prime.

It is not a weakly prime, because it can be changed into another prime (7139729131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3569864568 + 3569864569.

It is an arithmetic number, because the mean of its divisors is an integer number (3569864569).

Almost surely, 2^7139729137 is an apocalyptic number.

It is an amenable number.

7139729137 is a deficient number, since it is larger than the sum of its proper divisors (1).

7139729137 is an equidigital number, since it uses as much as digits as its factorization.

7139729137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 500094, while the sum is 49.

The square root of 7139729137 is about 84496.9179142056. The cubic root of 7139729137 is about 1925.5756202466.

The spelling of 7139729137 in words is "seven billion, one hundred thirty-nine million, seven hundred twenty-nine thousand, one hundred thirty-seven".