11651819 has 2 divisors, whose sum is σ = 11651820. Its totient is φ = 11651818.

The previous prime is 11651797. The next prime is 11651833. The reversal of 11651819 is 91815611.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11651819 is a prime.

It is a super-2 number, since 2×11651819² = 271529772017522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11651719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5825909 + 5825910.

It is an arithmetic number, because the mean of its divisors is an integer number (5825910).

Almost surely, 2^11651819 is an apocalyptic number.

11651819 is a deficient number, since it is larger than the sum of its proper divisors (1).

11651819 is an equidigital number, since it uses as much as digits as its factorization.

11651819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 32.

The square root of 11651819 is about 3413.4760875096. The cubic root of 11651819 is about 226.7068155044.

The spelling of 11651819 in words is "eleven million, six hundred fifty-one thousand, eight hundred nineteen".