81347101 has 8 divisors (see below), whose sum is σ = 88815744. Its totient is φ = 73890720.

The previous prime is 81347093. The next prime is 81347107. The reversal of 81347101 is 10174318.

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 81347101 - 2³ = 81347093 is a prime.

It is a super-2 number, since 2×81347101² = 13234701682208402, 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 (81347107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15996 + ... + 20458.

It is an arithmetic number, because the mean of its divisors is an integer number (11101968).

Almost surely, 2^81347101 is an apocalyptic number.

It is an amenable number.

81347101 is a deficient number, since it is larger than the sum of its proper divisors (7468643).

81347101 is a wasteful number, since it uses less digits than its factorization.

81347101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6131.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 81347101 is about 9019.2627747505. The cubic root of 81347101 is about 433.2920228206.

The spelling of 81347101 in words is "eighty-one million, three hundred forty-seven thousand, one hundred one".