5651691 has 8 divisors (see below), whose sum is σ = 7567824. Its totient is φ = 3751680.

The previous prime is 5651623. The next prime is 5651707. The reversal of 5651691 is 1961565.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-5651691 is a prime.

It is a super-2 number, since 2×5651691² = 63883222318962, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (5651621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3186 + ... + 4631.

It is an arithmetic number, because the mean of its divisors is an integer number (945978).

Almost surely, 2^5651691 is an apocalyptic number.

5651691 is a deficient number, since it is larger than the sum of its proper divisors (1916133).

5651691 is a wasteful number, since it uses less digits than its factorization.

5651691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8061.

The product of its digits is 8100, while the sum is 33.

The square root of 5651691 is about 2377.3285427134. The cubic root of 5651691 is about 178.1255164036.

The spelling of 5651691 in words is "five million, six hundred fifty-one thousand, six hundred ninety-one".