1920949959 has 12 divisors (see below), whose sum is σ = 2596854696. Its totient is φ = 1263079872.

The previous prime is 1920949931. The next prime is 1920949991. The reversal of 1920949959 is 9599490291.

It is not a de Polignac number, because 1920949959 - 2¹¹ = 1920947911 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1920949899 and 1920949908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1920949159) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44092 + ... + 76065.

It is an arithmetic number, because the mean of its divisors is an integer number (216404558).

Almost surely, 2^1920949959 is an apocalyptic number.

1920949959 is a deficient number, since it is larger than the sum of its proper divisors (675904737).

1920949959 is an equidigital number, since it uses as much as digits as its factorization.

1920949959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120306 (or 120233 counting only the distinct ones).

The product of its (nonzero) digits is 2361960, while the sum is 57.

The square root of 1920949959 is about 43828.6431343705. The cubic root of 1920949959 is about 1243.0979507709.

The spelling of 1920949959 in words is "one billion, nine hundred twenty million, nine hundred forty-nine thousand, nine hundred fifty-nine".