11899837 has 2 divisors, whose sum is σ = 11899838. Its totient is φ = 11899836.

The previous prime is 11899817. The next prime is 11899841. The reversal of 11899837 is 73899811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10830681 + 1069156 = 3291^2 + 1034^2 .

It is an emirp because it is prime and its reverse (73899811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11899837 - 2⁷ = 11899709 is a prime.

It is a super-2 number, since 2×11899837² = 283212241253138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11899817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5949918 + 5949919.

It is an arithmetic number, because the mean of its divisors is an integer number (5949919).

Almost surely, 2^11899837 is an apocalyptic number.

It is an amenable number.

11899837 is a deficient number, since it is larger than the sum of its proper divisors (1).

11899837 is an equidigital number, since it uses as much as digits as its factorization.

11899837 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 46.

The square root of 11899837 is about 3449.6140363815. The cubic root of 11899837 is about 228.3040789890.

It can be divided in two parts, 1189 and 9837, that added together give a triangular number (11026 = T₁₄₈).

The spelling of 11899837 in words is "eleven million, eight hundred ninety-nine thousand, eight hundred thirty-seven".