1934904721 has 4 divisors (see below), whose sum is σ = 1935002944. Its totient is φ = 1934806500.

The previous prime is 1934904701. The next prime is 1934904733. The reversal of 1934904721 is 1274094391.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1274094391 = 6247 ⋅203953.

It is a cyclic number.

It is not a de Polignac number, because 1934904721 - 2¹⁷ = 1934773649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1934904701) 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, 8205 + ... + 62746.

It is an arithmetic number, because the mean of its divisors is an integer number (483750736).

Almost surely, 2^1934904721 is an apocalyptic number.

It is an amenable number.

1934904721 is a deficient number, since it is larger than the sum of its proper divisors (98223).

1934904721 is an equidigital number, since it uses as much as digits as its factorization.

1934904721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98222.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 1934904721 is about 43987.5518868691. The cubic root of 1934904721 is about 1246.1008571410.

The spelling of 1934904721 in words is "one billion, nine hundred thirty-four million, nine hundred four thousand, seven hundred twenty-one".