5639691 has 4 divisors (see below), whose sum is σ = 7519592. Its totient is φ = 3759792.

The previous prime is 5639617. The next prime is 5639693. The reversal of 5639691 is 1969365.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 5639691 - 2¹³ = 5631499 is a prime.

It is a super-2 number, since 2×5639691² = 63612229150962, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5639693) 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, 939946 + ... + 939951.

It is an arithmetic number, because the mean of its divisors is an integer number (1879898).

Almost surely, 2^5639691 is an apocalyptic number.

5639691 is a deficient number, since it is larger than the sum of its proper divisors (1879901).

5639691 is a wasteful number, since it uses less digits than its factorization.

5639691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1879900.

The product of its digits is 43740, while the sum is 39.

The square root of 5639691 is about 2374.8033602806. The cubic root of 5639691 is about 177.9993582437. Note that the first 3 decimals are identical.

The spelling of 5639691 in words is "five million, six hundred thirty-nine thousand, six hundred ninety-one".