9881761 has 4 divisors (see below), whose sum is σ = 9894592. Its totient is φ = 9868932.

The previous prime is 9881749. The next prime is 9881803. The reversal of 9881761 is 1671889.

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: 1671889 = 521 ⋅3209.

It is a cyclic number.

It is not a de Polignac number, because 9881761 - 2⁷ = 9881633 is a prime.

It is a super-2 number, since 2×9881761² = 195298400922242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9881741) 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, 5181 + ... + 6826.

It is an arithmetic number, because the mean of its divisors is an integer number (2473648).

Almost surely, 2^9881761 is an apocalyptic number.

It is an amenable number.

9881761 is a deficient number, since it is larger than the sum of its proper divisors (12831).

9881761 is a wasteful number, since it uses less digits than its factorization.

9881761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12830.

The product of its digits is 24192, while the sum is 40.

The square root of 9881761 is about 3143.5268409861. The cubic root of 9881761 is about 214.5909728347.

The spelling of 9881761 in words is "nine million, eight hundred eighty-one thousand, seven hundred sixty-one".