11490731947 has 4 divisors (see below), whose sum is σ = 11504047680. Its totient is φ = 11477416216.

The previous prime is 11490731929. The next prime is 11490731957. The reversal of 11490731947 is 74913709411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74913709411 = 29 ⋅2583231359.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11490731947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11490731897 and 11490731906.

It is not an unprimeable number, because it can be changed into a prime (11490731927) 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, 6656572 + ... + 6658297.

It is an arithmetic number, because the mean of its divisors is an integer number (2876011920).

Almost surely, 2^11490731947 is an apocalyptic number.

11490731947 is a deficient number, since it is larger than the sum of its proper divisors (13315733).

11490731947 is an equidigital number, since it uses as much as digits as its factorization.

11490731947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13315732.

The product of its (nonzero) digits is 190512, while the sum is 46.

The spelling of 11490731947 in words is "eleven billion, four hundred ninety million, seven hundred thirty-one thousand, nine hundred forty-seven".