9961558 has 16 divisors (see below), whose sum is σ = 16368480. Its totient is φ = 4525696.

The previous prime is 9961543. The next prime is 9961573. The reversal of 9961558 is 8551699.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (9961543) and next prime (9961573).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4066 + ... + 6037.

It is an arithmetic number, because the mean of its divisors is an integer number (1023030).

Almost surely, 2^9961558 is an apocalyptic number.

9961558 is a deficient number, since it is larger than the sum of its proper divisors (6406922).

9961558 is a wasteful number, since it uses less digits than its factorization.

9961558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10151.

The product of its digits is 97200, while the sum is 43.

The square root of 9961558 is about 3156.1935935554. The cubic root of 9961558 is about 215.1670452294.

The spelling of 9961558 in words is "nine million, nine hundred sixty-one thousand, five hundred fifty-eight".