1928091653 has 4 divisors (see below), whose sum is σ = 1939637280. Its totient is φ = 1916546028.

The previous prime is 1928091623. The next prime is 1928091677. The reversal of 1928091653 is 3561908291.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3561908291 = 179 ⋅19898929.

It is a cyclic number.

It is not a de Polignac number, because 1928091653 - 2²⁰ = 1927043077 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 (1928091623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5772563 + ... + 5772896.

It is an arithmetic number, because the mean of its divisors is an integer number (484909320).

Almost surely, 2^1928091653 is an apocalyptic number.

It is an amenable number.

1928091653 is a deficient number, since it is larger than the sum of its proper divisors (11545627).

1928091653 is a wasteful number, since it uses less digits than its factorization.

1928091653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11545626.

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 1928091653 is about 43910.0404577359. The cubic root of 1928091653 is about 1244.6365724705.

The spelling of 1928091653 in words is "one billion, nine hundred twenty-eight million, ninety-one thousand, six hundred fifty-three".