3401639 has 4 divisors (see below), whose sum is σ = 3431856. Its totient is φ = 3371424.

The previous prime is 3401621. The next prime is 3401659. The reversal of 3401639 is 9361043.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9361043 = 127 ⋅73709.

It is a cyclic number.

It is not a de Polignac number, because 3401639 - 2⁸ = 3401383 is a prime.

It is a super-2 number, since 2×3401639² = 23142295772642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3401659) 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, 14939 + ... + 15164.

It is an arithmetic number, because the mean of its divisors is an integer number (857964).

Almost surely, 2^3401639 is an apocalyptic number.

3401639 is a deficient number, since it is larger than the sum of its proper divisors (30217).

3401639 is a wasteful number, since it uses less digits than its factorization.

3401639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30216.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 3401639 is about 1844.3532741858. The cubic root of 3401639 is about 150.3936180473.

The spelling of 3401639 in words is "three million, four hundred one thousand, six hundred thirty-nine".