11978901 has 32 divisors (see below), whose sum is σ = 19751040. Its totient is φ = 7113600.

The previous prime is 11978893. The next prime is 11978917. The reversal of 11978901 is 10987911.

11978901 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11978901 - 2³ = 11978893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11978921) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15361 + ... + 16121.

It is an arithmetic number, because the mean of its divisors is an integer number (617220).

Almost surely, 2^11978901 is an apocalyptic number.

11978901 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11978901 is a deficient number, since it is larger than the sum of its proper divisors (7772139).

11978901 is a wasteful number, since it uses less digits than its factorization.

11978901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834 (or 828 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 36.

The square root of 11978901 is about 3461.0548969931. The cubic root of 11978901 is about 228.8085902055.

The spelling of 11978901 in words is "eleven million, nine hundred seventy-eight thousand, nine hundred one".