9561911 has 2 divisors, whose sum is σ = 9561912. Its totient is φ = 9561910.

The previous prime is 9561901. The next prime is 9561941. The reversal of 9561911 is 1191659.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9561911 - 2⁶ = 9561847 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9561901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4780955 + 4780956.

It is an arithmetic number, because the mean of its divisors is an integer number (4780956).

Almost surely, 2^9561911 is an apocalyptic number.

9561911 is a deficient number, since it is larger than the sum of its proper divisors (1).

9561911 is an equidigital number, since it uses as much as digits as its factorization.

9561911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2430, while the sum is 32.

The square root of 9561911 is about 3092.2339820913. The cubic root of 9561911 is about 212.2502607050.

It can be divided in two parts, 956 and 1911, that multiplied together give a triangular number (1826916 = T₁₉₁₁).

The spelling of 9561911 in words is "nine million, five hundred sixty-one thousand, nine hundred eleven".