81498754 has 8 divisors (see below), whose sum is σ = 122466960. Its totient is φ = 40676436.

The previous prime is 81498751. The next prime is 81498757. The reversal of 81498754 is 45789418.

It is an interprime number because it is at equal distance from previous prime (81498751) and next prime (81498757).

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

It is not an unprimeable number, because it can be changed into a prime (81498751) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35064 + ... + 37315.

It is an arithmetic number, because the mean of its divisors is an integer number (15308370).

Almost surely, 2^81498754 is an apocalyptic number.

81498754 is a deficient number, since it is larger than the sum of its proper divisors (40968206).

81498754 is a wasteful number, since it uses less digits than its factorization.

81498754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72944.

The product of its digits is 322560, while the sum is 46.

The square root of 81498754 is about 9027.6660328127. Note that the first 3 decimals coincide. The cubic root of 81498754 is about 433.5611135147.

The spelling of 81498754 in words is "eighty-one million, four hundred ninety-eight thousand, seven hundred fifty-four".