11921739 has 8 divisors (see below), whose sum is σ = 15920640. Its totient is φ = 7935336.

The previous prime is 11921729. The next prime is 11921753. The reversal of 11921739 is 93712911.

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

It is not a de Polignac number, because 11921739 - 2¹² = 11917643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11921719) 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, 607 + ... + 4920.

It is an arithmetic number, because the mean of its divisors is an integer number (1990080).

Almost surely, 2^11921739 is an apocalyptic number.

11921739 is a deficient number, since it is larger than the sum of its proper divisors (3998901).

11921739 is an equidigital number, since it uses as much as digits as its factorization.

11921739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6249.

The product of its digits is 3402, while the sum is 33.

The square root of 11921739 is about 3452.7871350548. The cubic root of 11921739 is about 228.4440599351. Note that the first 3 decimals are identical.

The spelling of 11921739 in words is "eleven million, nine hundred twenty-one thousand, seven hundred thirty-nine".