11990651 has 4 divisors (see below), whose sum is σ = 12078312. Its totient is φ = 11902992.

The previous prime is 11990639. The next prime is 11990677. The reversal of 11990651 is 15609911.

It is a happy number.

11990651 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11990651 is a prime.

It is a super-2 number, since 2×11990651² = 287551422807602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11990611) by changing a digit.

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, 43625 + ... + 43898.

It is an arithmetic number, because the mean of its divisors is an integer number (3019578).

Almost surely, 2^11990651 is an apocalyptic number.

11990651 is a deficient number, since it is larger than the sum of its proper divisors (87661).

11990651 is an equidigital number, since it uses as much as digits as its factorization.

11990651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87660.

The product of its (nonzero) digits is 2430, while the sum is 32.

The square root of 11990651 is about 3462.7519402926. The cubic root of 11990651 is about 228.8833778779.

The spelling of 11990651 in words is "eleven million, nine hundred ninety thousand, six hundred fifty-one".