101381391 has 6 divisors (see below), whose sum is σ = 146439800. Its totient is φ = 67587588.

The previous prime is 101381389. The next prime is 101381459. The reversal of 101381391 is 193183101.

It is a happy number.

It is not a de Polignac number, because 101381391 - 2¹ = 101381389 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 (101381311) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5632291 + ... + 5632308.

Almost surely, 2^101381391 is an apocalyptic number.

101381391 is a deficient number, since it is larger than the sum of its proper divisors (45058409).

101381391 is a wasteful number, since it uses less digits than its factorization.

101381391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11264605 (or 11264602 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 101381391 is about 10068.8326532920. The cubic root of 101381391 is about 466.2863998013.

The spelling of 101381391 in words is "one hundred one million, three hundred eighty-one thousand, three hundred ninety-one".