11921907 has 8 divisors (see below), whose sum is σ = 15921360. Its totient is φ = 7935200.

The previous prime is 11921867. The next prime is 11921933. The reversal of 11921907 is 70912911.

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 11921907 - 2¹⁶ = 11856371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11921957) 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, 732 + ... + 4937.

It is an arithmetic number, because the mean of its divisors is an integer number (1990170).

Almost surely, 2^11921907 is an apocalyptic number.

11921907 is a deficient number, since it is larger than the sum of its proper divisors (3999453).

11921907 is an equidigital number, since it uses as much as digits as its factorization.

11921907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6373.

The product of its (nonzero) digits is 1134, while the sum is 30.

The square root of 11921907 is about 3452.8114631413. The cubic root of 11921907 is about 228.4451330007.

The spelling of 11921907 in words is "eleven million, nine hundred twenty-one thousand, nine hundred seven".