9551691 has 12 divisors (see below), whose sum is σ = 13845832. Its totient is φ = 6345216.

The previous prime is 9551683. The next prime is 9551741. The reversal of 9551691 is 1961559.

It is not a de Polignac number, because 9551691 - 2³ = 9551683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9551621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1035 + ... + 4491.

Almost surely, 2^9551691 is an apocalyptic number.

9551691 is a deficient number, since it is larger than the sum of its proper divisors (4294141).

9551691 is a wasteful number, since it uses less digits than its factorization.

9551691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3770 (or 3767 counting only the distinct ones).

The product of its digits is 12150, while the sum is 36.

The square root of 9551691 is about 3090.5810133371. The cubic root of 9551691 is about 212.1746143566.

The spelling of 9551691 in words is "nine million, five hundred fifty-one thousand, six hundred ninety-one".