9948687139 has 2 divisors, whose sum is σ = 9948687140. Its totient is φ = 9948687138.

The previous prime is 9948687103. The next prime is 9948687143. The reversal of 9948687139 is 9317868499.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9948687139 - 2²¹ = 9946589987 is a prime.

It is not a weakly prime, because it can be changed into another prime (9948687179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4974343569 + 4974343570.

It is an arithmetic number, because the mean of its divisors is an integer number (4974343570).

Almost surely, 2^9948687139 is an apocalyptic number.

9948687139 is a deficient number, since it is larger than the sum of its proper divisors (1).

9948687139 is an equidigital number, since it uses as much as digits as its factorization.

9948687139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23514624, while the sum is 64.

The square root of 9948687139 is about 99743.1057216488. The cubic root of 9948687139 is about 2150.7433621346.

The spelling of 9948687139 in words is "nine billion, nine hundred forty-eight million, six hundred eighty-seven thousand, one hundred thirty-nine".