1020957649 has 4 divisors (see below), whose sum is σ = 1065347136. Its totient is φ = 976568164.

The previous prime is 1020957601. The next prime is 1020957683. The reversal of 1020957649 is 9467590201.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 1020957649 - 2¹⁵ = 1020924881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020957349) 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 3 ways as a sum of consecutive naturals, for example, 22194709 + ... + 22194754.

It is an arithmetic number, because the mean of its divisors is an integer number (266336784).

Almost surely, 2^1020957649 is an apocalyptic number.

It is an amenable number.

1020957649 is a deficient number, since it is larger than the sum of its proper divisors (44389487).

1020957649 is an equidigital number, since it uses as much as digits as its factorization.

1020957649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44389486.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 1020957649 is about 31952.4279046210. The cubic root of 1020957649 is about 1006.9376408348.

The spelling of 1020957649 in words is "one billion, twenty million, nine hundred fifty-seven thousand, six hundred forty-nine".