81374858 has 8 divisors (see below), whose sum is σ = 122136960. Its totient is φ = 40662540.

The previous prime is 81374833. The next prime is 81374863. The reversal of 81374858 is 85847318.

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

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, 8048 + ... + 15083.

It is an arithmetic number, because the mean of its divisors is an integer number (15267120).

Almost surely, 2^81374858 is an apocalyptic number.

81374858 is a deficient number, since it is larger than the sum of its proper divisors (40762102).

81374858 is a wasteful number, since it uses less digits than its factorization.

81374858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24892.

The product of its digits is 215040, while the sum is 44.

The square root of 81374858 is about 9020.8014056402. The cubic root of 81374858 is about 433.3412993933.

The spelling of 81374858 in words is "eighty-one million, three hundred seventy-four thousand, eight hundred fifty-eight".