11901599 has 2 divisors, whose sum is σ = 11901600. Its totient is φ = 11901598.

The previous prime is 11901569. The next prime is 11901611. The reversal of 11901599 is 99510911.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11901599 - 2²⁰ = 10853023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11901509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5950799 + 5950800.

It is an arithmetic number, because the mean of its divisors is an integer number (5950800).

Almost surely, 2^11901599 is an apocalyptic number.

11901599 is a deficient number, since it is larger than the sum of its proper divisors (1).

11901599 is an equidigital number, since it uses as much as digits as its factorization.

11901599 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3645, while the sum is 35.

The square root of 11901599 is about 3449.8694178186. The cubic root of 11901599 is about 228.3153467045.

The spelling of 11901599 in words is "eleven million, nine hundred one thousand, five hundred ninety-nine".