5951639 has 4 divisors (see below), whose sum is σ = 5968224. Its totient is φ = 5935056.

The previous prime is 5951633. The next prime is 5951663. The reversal of 5951639 is 9361595.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9361595 = 5 ⋅1872319.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5951639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5951633) 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, 7742 + ... + 8475.

It is an arithmetic number, because the mean of its divisors is an integer number (1492056).

Almost surely, 2^5951639 is an apocalyptic number.

5951639 is a deficient number, since it is larger than the sum of its proper divisors (16585).

5951639 is a wasteful number, since it uses less digits than its factorization.

5951639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16584.

The product of its digits is 36450, while the sum is 38.

The square root of 5951639 is about 2439.5981226423. The cubic root of 5951639 is about 181.2225318660. Note that the first 3 decimals are identical.

The spelling of 5951639 in words is "five million, nine hundred fifty-one thousand, six hundred thirty-nine".