9779901 has 16 divisors (see below), whose sum is σ = 13440000. Its totient is φ = 6322608.

The previous prime is 9779881. The next prime is 9779909. The reversal of 9779901 is 1099779.

It is not a de Polignac number, because 9779901 - 2⁹ = 9779389 is a prime.

It is an Ulam number.

9779901 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9779909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19350 + ... + 19848.

It is an arithmetic number, because the mean of its divisors is an integer number (840000).

Almost surely, 2^9779901 is an apocalyptic number.

It is an amenable number.

9779901 is a deficient number, since it is larger than the sum of its proper divisors (3660099).

9779901 is a wasteful number, since it uses less digits than its factorization.

9779901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688.

The product of its (nonzero) digits is 35721, while the sum is 42.

The square root of 9779901 is about 3127.2833258277. The cubic root of 9779901 is about 213.8510988526.

It can be divided in two parts, 977 and 9901, that added together give a triangular number (10878 = T₁₄₇).

The spelling of 9779901 in words is "nine million, seven hundred seventy-nine thousand, nine hundred one".