1921389041 has 32 divisors (see below), whose sum is σ = 2415262080. Its totient is φ = 1502323200.

The previous prime is 1921389037. The next prime is 1921389047. The reversal of 1921389041 is 1409831291.

It is a cyclic number.

It is not a de Polignac number, because 1921389041 - 2² = 1921389037 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1921388986 and 1921389004.

It is not an unprimeable number, because it can be changed into a prime (1921389047) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 159941 + ... + 171533.

It is an arithmetic number, because the mean of its divisors is an integer number (75476940).

Almost surely, 2^1921389041 is an apocalyptic number.

1921389041 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1921389041 is a deficient number, since it is larger than the sum of its proper divisors (493873039).

1921389041 is a wasteful number, since it uses less digits than its factorization.

1921389041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11697.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 1921389041 is about 43833.6519240640. The cubic root of 1921389041 is about 1243.1926574462.

The spelling of 1921389041 in words is "one billion, nine hundred twenty-one million, three hundred eighty-nine thousand, forty-one".