11929887 has 6 divisors (see below), whose sum is σ = 17232072. Its totient is φ = 7953252.

The previous prime is 11929871. The next prime is 11929889. The reversal of 11929887 is 78892911.

11929887 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11929887 - 2⁴ = 11929871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11929889) 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, 662763 + ... + 662780.

It is an arithmetic number, because the mean of its divisors is an integer number (2872012).

Almost surely, 2^11929887 is an apocalyptic number.

11929887 is a deficient number, since it is larger than the sum of its proper divisors (5302185).

11929887 is a wasteful number, since it uses less digits than its factorization.

11929887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325549 (or 1325546 counting only the distinct ones).

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

The square root of 11929887 is about 3453.9668498699. The cubic root of 11929887 is about 228.4960920061.

It can be divided in two parts, 119 and 29887, that multiplied together give a palindrome (3556553).

The spelling of 11929887 in words is "eleven million, nine hundred twenty-nine thousand, eight hundred eighty-seven".