101439391 has 8 divisors (see below), whose sum is σ = 107838864. Its totient is φ = 95088000.

The previous prime is 101439389. The next prime is 101439421. The reversal of 101439391 is 193934101.

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 101439391 - 2¹ = 101439389 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 (101439341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7620 + ... + 16153.

It is an arithmetic number, because the mean of its divisors is an integer number (13479858).

Almost surely, 2^101439391 is an apocalyptic number.

101439391 is a deficient number, since it is larger than the sum of its proper divisors (6399473).

101439391 is a wasteful number, since it uses less digits than its factorization.

101439391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24041.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 101439391 is about 10071.7124164662. The cubic root of 101439391 is about 466.3753032157.

The spelling of 101439391 in words is "one hundred one million, four hundred thirty-nine thousand, three hundred ninety-one".