9135977869 has 4 divisors (see below), whose sum is σ = 9285748060. Its totient is φ = 8986207680.

The previous prime is 9135977857. The next prime is 9135977887. The reversal of 9135977869 is 9687795319.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9687795319 = 599 ⋅16173281.

It can be written as a sum of positive squares in 2 ways, for example, as 1843671844 + 7292306025 = 42938^2 + 85395^2 .

It is not a de Polignac number, because 9135977869 - 2¹⁵ = 9135945101 is a prime.

It is a super-2 number, since 2×9135977869² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9135977869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9135977819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74885004 + ... + 74885125.

It is an arithmetic number, because the mean of its divisors is an integer number (2321437015).

Almost surely, 2^9135977869 is an apocalyptic number.

It is an amenable number.

9135977869 is a deficient number, since it is larger than the sum of its proper divisors (149770191).

9135977869 is a wasteful number, since it uses less digits than its factorization.

9135977869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149770190.

The product of its digits is 25719120, while the sum is 64.

The square root of 9135977869 is about 95582.3093935274. The cubic root of 9135977869 is about 2090.5072575822.

The spelling of 9135977869 in words is "nine billion, one hundred thirty-five million, nine hundred seventy-seven thousand, eight hundred sixty-nine".