1921328827 has 8 divisors (see below), whose sum is σ = 2097426240. Its totient is φ = 1745469960.

The previous prime is 1921328809. The next prime is 1921328837. The reversal of 1921328827 is 7288231291.

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

It is a cyclic number.

It is not a de Polignac number, because 1921328827 - 2⁷ = 1921328699 is a prime.

It is a super-2 number, since 2×1921328827² = 7383008922922391858, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1921328837) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42577 + ... + 75202.

It is an arithmetic number, because the mean of its divisors is an integer number (262178280).

Almost surely, 2^1921328827 is an apocalyptic number.

1921328827 is a deficient number, since it is larger than the sum of its proper divisors (176097413).

1921328827 is a wasteful number, since it uses less digits than its factorization.

1921328827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119273.

The product of its digits is 96768, while the sum is 43.

The square root of 1921328827 is about 43832.9650719638. The cubic root of 1921328827 is about 1243.1796705944.

The spelling of 1921328827 in words is "one billion, nine hundred twenty-one million, three hundred twenty-eight thousand, eight hundred twenty-seven".