11961899 has 2 divisors, whose sum is σ = 11961900. Its totient is φ = 11961898.

The previous prime is 11961871. The next prime is 11961967. The reversal of 11961899 is 99816911.

11961899 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11961899 is a prime.

It is not a weakly prime, because it can be changed into another prime (11961839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5980949 + 5980950.

It is an arithmetic number, because the mean of its divisors is an integer number (5980950).

Almost surely, 2^11961899 is an apocalyptic number.

11961899 is a deficient number, since it is larger than the sum of its proper divisors (1).

11961899 is an equidigital number, since it uses as much as digits as its factorization.

11961899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 44.

The square root of 11961899 is about 3458.5978372745. The cubic root of 11961899 is about 228.7002874045.

The spelling of 11961899 in words is "eleven million, nine hundred sixty-one thousand, eight hundred ninety-nine".