43139901 has 16 divisors (see below), whose sum is σ = 66214400. Its totient is φ = 24472368.

The previous prime is 43139867. The next prime is 43139917. The reversal of 43139901 is 10993134.

It is not a de Polignac number, because 43139901 - 2⁷ = 43139773 is a prime.

It is a super-3 number, since 3×43139901³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43139951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4471 + ... + 10308.

It is an arithmetic number, because the mean of its divisors is an integer number (4138400).

Almost surely, 2^43139901 is an apocalyptic number.

It is an amenable number.

43139901 is a deficient number, since it is larger than the sum of its proper divisors (23074499).

43139901 is a wasteful number, since it uses less digits than its factorization.

43139901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14928.

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 43139901 is about 6568.0972130443. The cubic root of 43139901 is about 350.7193396077.

The spelling of 43139901 in words is "forty-three million, one hundred thirty-nine thousand, nine hundred one".