11897829 has 6 divisors (see below), whose sum is σ = 17185766. Its totient is φ = 7931880.

The previous prime is 11897827. The next prime is 11897833. The reversal of 11897829 is 92879811.

It can be written as a sum of positive squares in only one way, i.e., 7049025 + 4848804 = 2655^2 + 2202^2 .

It is not a de Polignac number, because 11897829 - 2¹ = 11897827 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11897827) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 660982 + ... + 660999.

Almost surely, 2^11897829 is an apocalyptic number.

It is an amenable number.

11897829 is a deficient number, since it is larger than the sum of its proper divisors (5287937).

11897829 is a wasteful number, since it uses less digits than its factorization.

11897829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321987 (or 1321984 counting only the distinct ones).

The product of its digits is 72576, while the sum is 45.

The square root of 11897829 is about 3449.3229770493. The cubic root of 11897829 is about 228.2912367856.

The spelling of 11897829 in words is "eleven million, eight hundred ninety-seven thousand, eight hundred twenty-nine".