11901899 has 2 divisors, whose sum is σ = 11901900. Its totient is φ = 11901898.

The previous prime is 11901821. The next prime is 11901907. The reversal of 11901899 is 99810911.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (99810911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11901899 - 2¹² = 11897803 is a prime.

It is not a weakly prime, because it can be changed into another prime (11901299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5950949 + 5950950.

It is an arithmetic number, because the mean of its divisors is an integer number (5950950).

Almost surely, 2^11901899 is an apocalyptic number.

11901899 is a deficient number, since it is larger than the sum of its proper divisors (1).

11901899 is an equidigital number, since it uses as much as digits as its factorization.

11901899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 38.

The square root of 11901899 is about 3449.9128974512. The cubic root of 11901899 is about 228.3172650469.

It can be divided in two parts, 1190189 and 9, that multiplied together give a palindrome (10711701).

The spelling of 11901899 in words is "eleven million, nine hundred one thousand, eight hundred ninety-nine".