1939819453 has 16 divisors (see below), whose sum is σ = 2282841792. Its totient is φ = 1625040000.

The previous prime is 1939819447. The next prime is 1939819457. The reversal of 1939819453 is 3549189391.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1939819453 - 2¹⁷ = 1939688381 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1939819453.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1939819457) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74658 + ... + 97228.

It is an arithmetic number, because the mean of its divisors is an integer number (142677612).

Almost surely, 2^1939819453 is an apocalyptic number.

1939819453 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1939819453 is a deficient number, since it is larger than the sum of its proper divisors (343022339).

1939819453 is a wasteful number, since it uses less digits than its factorization.

1939819453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23196.

The product of its digits is 1049760, while the sum is 52.

The square root of 1939819453 is about 44043.3814891636. The cubic root of 1939819453 is about 1247.1550130586.

The spelling of 1939819453 in words is "one billion, nine hundred thirty-nine million, eight hundred nineteen thousand, four hundred fifty-three".