81914601 has 8 divisors (see below), whose sum is σ = 109571904. Its totient is φ = 54433520.

The previous prime is 81914587. The next prime is 81914639. The reversal of 81914601 is 10641918.

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 81914601 - 2¹⁰ = 81913577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81914641) 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, 42966 + ... + 44831.

It is an arithmetic number, because the mean of its divisors is an integer number (13696488).

Almost surely, 2^81914601 is an apocalyptic number.

It is an amenable number.

81914601 is a deficient number, since it is larger than the sum of its proper divisors (27657303).

81914601 is a wasteful number, since it uses less digits than its factorization.

81914601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88111.

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 81914601 is about 9050.6685388429. The cubic root of 81914601 is about 434.2972773383.

The spelling of 81914601 in words is "eighty-one million, nine hundred fourteen thousand, six hundred one".