11920999 has 8 divisors (see below), whose sum is σ = 12584880. Its totient is φ = 11260800.

The previous prime is 11920991. The next prime is 11921017. The reversal of 11920999 is 99902911.

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 11920999 - 2³ = 11920991 is a prime.

It is a super-2 number, since 2×11920999² = 284220434316002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11920991) 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, 8079 + ... + 9439.

It is an arithmetic number, because the mean of its divisors is an integer number (1573110).

Almost surely, 2^11920999 is an apocalyptic number.

11920999 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

11920999 is a deficient number, since it is larger than the sum of its proper divisors (663881).

11920999 is a wasteful number, since it uses less digits than its factorization.

11920999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1841.

The product of its (nonzero) digits is 13122, while the sum is 40.

The square root of 11920999 is about 3452.6799735857. The cubic root of 11920999 is about 228.4393332169.

The spelling of 11920999 in words is "eleven million, nine hundred twenty thousand, nine hundred ninety-nine".