81087754 has 16 divisors (see below), whose sum is σ = 136970496. Its totient is φ = 35668800.

The previous prime is 81087731. The next prime is 81087767. The reversal of 81087754 is 45778018.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58767 + ... + 60130.

It is an arithmetic number, because the mean of its divisors is an integer number (8560656).

Almost surely, 2^81087754 is an apocalyptic number.

81087754 is a deficient number, since it is larger than the sum of its proper divisors (55882742).

81087754 is a wasteful number, since it uses less digits than its factorization.

81087754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118941.

The product of its (nonzero) digits is 62720, while the sum is 40.

The square root of 81087754 is about 9004.8739025041. The cubic root of 81087754 is about 432.8310655253.

The spelling of 81087754 in words is "eighty-one million, eighty-seven thousand, seven hundred fifty-four".