11949851 has 2 divisors, whose sum is σ = 11949852. Its totient is φ = 11949850.

The previous prime is 11949809. The next prime is 11949869. The reversal of 11949851 is 15894911.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11949851 - 2²² = 7755547 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11949251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5974925 + 5974926.

It is an arithmetic number, because the mean of its divisors is an integer number (5974926).

Almost surely, 2^11949851 is an apocalyptic number.

11949851 is a deficient number, since it is larger than the sum of its proper divisors (1).

11949851 is an equidigital number, since it uses as much as digits as its factorization.

11949851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 38.

The square root of 11949851 is about 3456.8556521787. The cubic root of 11949851 is about 228.6234794592.

The spelling of 11949851 in words is "eleven million, nine hundred forty-nine thousand, eight hundred fifty-one".