1921900141 has 8 divisors (see below), whose sum is σ = 2312060480. Its totient is φ = 1560640608.

The previous prime is 1921900129. The next prime is 1921900163. The reversal of 1921900141 is 1410091291.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1921900141 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 (1921900111) 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, 7225056 + ... + 7225321.

It is an arithmetic number, because the mean of its divisors is an integer number (289007560).

Almost surely, 2^1921900141 is an apocalyptic number.

It is an amenable number.

1921900141 is a deficient number, since it is larger than the sum of its proper divisors (390160339).

1921900141 is a wasteful number, since it uses less digits than its factorization.

1921900141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14450403.

The product of its (nonzero) digits is 648, while the sum is 28.

The square root of 1921900141 is about 43839.4815320619. The cubic root of 1921900141 is about 1243.3028796904.

The spelling of 1921900141 in words is "one billion, nine hundred twenty-one million, nine hundred thousand, one hundred forty-one".