1920005949 has 8 divisors (see below), whose sum is σ = 2564227840. Its totient is φ = 1277894016.

The previous prime is 1920005947. The next prime is 1920005951. The reversal of 1920005949 is 9495000291.

It is an interprime number because it is at equal distance from previous prime (1920005947) and next prime (1920005951).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1920005949 - 2¹ = 1920005947 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1920005947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 525364 + ... + 529005.

It is an arithmetic number, because the mean of its divisors is an integer number (320528480).

Almost surely, 2^1920005949 is an apocalyptic number.

It is an amenable number.

1920005949 is a deficient number, since it is larger than the sum of its proper divisors (644221891).

1920005949 is a wasteful number, since it uses less digits than its factorization.

1920005949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1054979.

The product of its (nonzero) digits is 29160, while the sum is 39.

The square root of 1920005949 is about 43817.8724837252. The cubic root of 1920005949 is about 1242.8942860556.

The spelling of 1920005949 in words is "one billion, nine hundred twenty million, five thousand, nine hundred forty-nine".