9961579 has 2 divisors, whose sum is σ = 9961580. Its totient is φ = 9961578.

The previous prime is 9961573. The next prime is 9961583. The reversal of 9961579 is 9751699.

It is a strong prime.

It is an emirp because it is prime and its reverse (9751699) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9961579 - 2⁷ = 9961451 is a prime.

It is not a weakly prime, because it can be changed into another prime (9961573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4980789 + 4980790.

It is an arithmetic number, because the mean of its divisors is an integer number (4980790).

Almost surely, 2^9961579 is an apocalyptic number.

9961579 is a deficient number, since it is larger than the sum of its proper divisors (1).

9961579 is an equidigital number, since it uses as much as digits as its factorization.

9961579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 153090, while the sum is 46.

The square root of 9961579 is about 3156.1969203458. The cubic root of 9961579 is about 215.1671964275.

It can be divided in two parts, 996157 and 9, that added together give a triangular number (996166 = T₁₄₁₁).

The spelling of 9961579 in words is "nine million, nine hundred sixty-one thousand, five hundred seventy-nine".