9139997869 has 2 divisors, whose sum is σ = 9139997870. Its totient is φ = 9139997868.

The previous prime is 9139997863. The next prime is 9139997953. The reversal of 9139997869 is 9687999319.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5125128100 + 4014869769 = 71590^2 + 63363^2 .

It is a cyclic number.

It is not a de Polignac number, because 9139997869 - 2²³ = 9131609261 is a prime.

It is a super-2 number, since 2×9139997869² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9139997798 and 9139997807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9139997863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4569998934 + 4569998935.

It is an arithmetic number, because the mean of its divisors is an integer number (4569998935).

Almost surely, 2^9139997869 is an apocalyptic number.

It is an amenable number.

9139997869 is a deficient number, since it is larger than the sum of its proper divisors (1).

9139997869 is an equidigital number, since it uses as much as digits as its factorization.

9139997869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 59521392, while the sum is 70.

The square root of 9139997869 is about 95603.3360767290. The cubic root of 9139997869 is about 2090.8138332979.

The spelling of 9139997869 in words is "nine billion, one hundred thirty-nine million, nine hundred ninety-seven thousand, eight hundred sixty-nine".