81197234 has 8 divisors (see below), whose sum is σ = 121945260. Its totient is φ = 40548816.

The previous prime is 81197197. The next prime is 81197273. The reversal of 81197234 is 43279118.

It can be written as a sum of positive squares in 2 ways, for example, as 76510009 + 4687225 = 8747^2 + 2165^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 81197194 and 81197203.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22829 + ... + 26144.

Almost surely, 2^81197234 is an apocalyptic number.

81197234 is a deficient number, since it is larger than the sum of its proper divisors (40748026).

81197234 is a wasteful number, since it uses less digits than its factorization.

81197234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49804.

The product of its digits is 12096, while the sum is 35.

The square root of 81197234 is about 9010.9507822427. The cubic root of 81197234 is about 433.0257724225.

The spelling of 81197234 in words is "eighty-one million, one hundred ninety-seven thousand, two hundred thirty-four".