1921772234 has 8 divisors (see below), whose sum is σ = 2890689120. Its totient is φ = 958209196.

The previous prime is 1921772221. The next prime is 1921772269. The reversal of 1921772234 is 4322771291.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1337564 + ... + 1338999.

It is an arithmetic number, because the mean of its divisors is an integer number (361336140).

Almost surely, 2^1921772234 is an apocalyptic number.

1921772234 is a deficient number, since it is larger than the sum of its proper divisors (968916886).

1921772234 is a wasteful number, since it uses less digits than its factorization.

1921772234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2676924.

The product of its digits is 42336, while the sum is 38.

The square root of 1921772234 is about 43838.0226971975. The cubic root of 1921772234 is about 1243.2752974961.

The spelling of 1921772234 in words is "one billion, nine hundred twenty-one million, seven hundred seventy-two thousand, two hundred thirty-four".