9187961 has 4 divisors (see below), whose sum is σ = 9204624. Its totient is φ = 9171300.

The previous prime is 9187957. The next prime is 9187967. The reversal of 9187961 is 1697819.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1697819 = 37 ⋅45887.

It is a cyclic number.

It is not a de Polignac number, because 9187961 - 2² = 9187957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9187967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7475 + ... + 8616.

It is an arithmetic number, because the mean of its divisors is an integer number (2301156).

Almost surely, 2^9187961 is an apocalyptic number.

It is an amenable number.

9187961 is a deficient number, since it is larger than the sum of its proper divisors (16663).

9187961 is a wasteful number, since it uses less digits than its factorization.

9187961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16662.

The product of its digits is 27216, while the sum is 41.

The square root of 9187961 is about 3031.1649575699. The cubic root of 9187961 is about 209.4464712117.

The spelling of 9187961 in words is "nine million, one hundred eighty-seven thousand, nine hundred sixty-one".