9129139569 has 24 divisors (see below), whose sum is σ = 14524990272. Its totient is φ = 5479089120.

The previous prime is 9129139559. The next prime is 9129139583. The reversal of 9129139569 is 9659319219.

It is not a de Polignac number, because 9129139569 - 2¹³ = 9129131377 is a prime.

It is a super-2 number, since 2×9129139569² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9129139549) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 437442 + ... + 457835.

It is an arithmetic number, because the mean of its divisors is an integer number (605207928).

Almost surely, 2^9129139569 is an apocalyptic number.

9129139569 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

It is an amenable number.

9129139569 is a deficient number, since it is larger than the sum of its proper divisors (5395850703).

9129139569 is a wasteful number, since it uses less digits than its factorization.

9129139569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 895397 (or 895394 counting only the distinct ones).

The product of its digits is 1180980, while the sum is 54.

The square root of 9129139569 is about 95546.5309103371. The cubic root of 9129139569 is about 2089.9855442633.

The spelling of 9129139569 in words is "nine billion, one hundred twenty-nine million, one hundred thirty-nine thousand, five hundred sixty-nine".