81701854 has 8 divisors (see below), whose sum is σ = 131979960. Its totient is φ = 37708536.

The previous prime is 81701831. The next prime is 81701861. The reversal of 81701854 is 45810718.

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

It is a congruent number.

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, 1571164 + ... + 1571215.

It is an arithmetic number, because the mean of its divisors is an integer number (16497495).

Almost surely, 2^81701854 is an apocalyptic number.

81701854 is a deficient number, since it is larger than the sum of its proper divisors (50278106).

81701854 is a wasteful number, since it uses less digits than its factorization.

81701854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3142394.

The product of its (nonzero) digits is 8960, while the sum is 34.

The square root of 81701854 is about 9038.9077880018. The cubic root of 81701854 is about 433.9209685706.

The spelling of 81701854 in words is "eighty-one million, seven hundred one thousand, eight hundred fifty-four".