9691785401 has 4 divisors (see below), whose sum is σ = 9703946532. Its totient is φ = 9679624272.

The previous prime is 9691785329. The next prime is 9691785407. The reversal of 9691785401 is 1045871969.

9691785401 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3510681001 + 6181104400 = 59251^2 + 78620^2 .

It is a cyclic number.

It is not a de Polignac number, because 9691785401 - 2²² = 9687591097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9691785401.

It is not an unprimeable number, because it can be changed into a prime (9691785407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6079370 + ... + 6080963.

It is an arithmetic number, because the mean of its divisors is an integer number (2425986633).

Almost surely, 2^9691785401 is an apocalyptic number.

It is an amenable number.

9691785401 is a deficient number, since it is larger than the sum of its proper divisors (12161131).

9691785401 is a wasteful number, since it uses less digits than its factorization.

9691785401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12161130.

The product of its (nonzero) digits is 544320, while the sum is 50.

The square root of 9691785401 is about 98446.8658769795. The cubic root of 9691785401 is about 2132.0690366484.

The spelling of 9691785401 in words is "nine billion, six hundred ninety-one million, seven hundred eighty-five thousand, four hundred one".