1011021949 has 12 divisors (see below), whose sum is σ = 1176616800. Its totient is φ = 866199768.

The previous prime is 1011021937. The next prime is 1011021953. The reversal of 1011021949 is 9491201101.

It is not a de Polignac number, because 1011021949 - 2⁷ = 1011021821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011021149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 176472 + ... + 182110.

It is an arithmetic number, because the mean of its divisors is an integer number (98051400).

Almost surely, 2^1011021949 is an apocalyptic number.

It is an amenable number.

1011021949 is a deficient number, since it is larger than the sum of its proper divisors (165594851).

1011021949 is an equidigital number, since it uses as much as digits as its factorization.

1011021949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9312 (or 9305 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 28.

The square root of 1011021949 is about 31796.5713403191. The cubic root of 1011021949 is about 1003.6605668997.

The spelling of 1011021949 in words is "one billion, eleven million, twenty-one thousand, nine hundred forty-nine".