11739999449 has 4 divisors (see below), whose sum is σ = 12013022736. Its totient is φ = 11466976164.

The previous prime is 11739999437. The next prime is 11739999461. The reversal of 11739999449 is 94499993711.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94499993711 = 5779 ⋅16352309.

It is an interprime number because it is at equal distance from previous prime (11739999437) and next prime (11739999461).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11739999449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11739959449) 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, 136511579 + ... + 136511664.

It is an arithmetic number, because the mean of its divisors is an integer number (3003255684).

Almost surely, 2^11739999449 is an apocalyptic number.

It is an amenable number.

11739999449 is a deficient number, since it is larger than the sum of its proper divisors (273023287).

11739999449 is an equidigital number, since it uses as much as digits as its factorization.

11739999449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273023286.

The product of its digits is 19840464, while the sum is 65.

The spelling of 11739999449 in words is "eleven billion, seven hundred thirty-nine million, nine hundred ninety-nine thousand, four hundred forty-nine".