11900005309 has 8 divisors (see below), whose sum is σ = 12288481280. Its totient is φ = 11511817200.

The previous prime is 11900005307. The next prime is 11900005331. The reversal of 11900005309 is 90350000911.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11900005309 - 2¹ = 11900005307 is a prime.

It is a super-2 number, since 2×11900005309² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11900005301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13699 + ... + 154879.

It is an arithmetic number, because the mean of its divisors is an integer number (1536060160).

Almost surely, 2^11900005309 is an apocalyptic number.

It is an amenable number.

11900005309 is a deficient number, since it is larger than the sum of its proper divisors (388475971).

11900005309 is a wasteful number, since it uses less digits than its factorization.

11900005309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143931.

The product of its (nonzero) digits is 1215, while the sum is 28.

The spelling of 11900005309 in words is "eleven billion, nine hundred million, five thousand, three hundred nine".