1081549947 has 32 divisors (see below), whose sum is σ = 1533901824. Its totient is φ = 676972800.

The previous prime is 1081549933. The next prime is 1081549957. The reversal of 1081549947 is 7499451801.

It is not a de Polignac number, because 1081549947 - 2⁶ = 1081549883 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1081549896 and 1081549905.

It is not an unprimeable number, because it can be changed into a prime (1081549957) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 351108 + ... + 354174.

It is an arithmetic number, because the mean of its divisors is an integer number (47934432).

Almost surely, 2^1081549947 is an apocalyptic number.

1081549947 is a deficient number, since it is larger than the sum of its proper divisors (452351877).

1081549947 is a wasteful number, since it uses less digits than its factorization.

1081549947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3219.

The product of its (nonzero) digits is 362880, while the sum is 48.

The square root of 1081549947 is about 32886.9266882754. The cubic root of 1081549947 is about 1026.4761430462.

The spelling of 1081549947 in words is "one billion, eighty-one million, five hundred forty-nine thousand, nine hundred forty-seven".