5401639 has 8 divisors (see below), whose sum is σ = 5503680. Its totient is φ = 5300736.

The previous prime is 5401633. The next prime is 5401661. The reversal of 5401639 is 9361045.

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

It is a cyclic number.

It is not a de Polignac number, because 5401639 - 2¹⁵ = 5368871 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 (5401633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22482 + ... + 22720.

It is an arithmetic number, because the mean of its divisors is an integer number (687960).

Almost surely, 2^5401639 is an apocalyptic number.

5401639 is a deficient number, since it is larger than the sum of its proper divisors (102041).

5401639 is a wasteful number, since it uses less digits than its factorization.

5401639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 5401639 is about 2324.1426376193. The cubic root of 5401639 is about 175.4588123679.

The spelling of 5401639 in words is "five million, four hundred one thousand, six hundred thirty-nine".