99981654 has 8 divisors (see below), whose sum is σ = 199963320. Its totient is φ = 33327216.

The previous prime is 99981653. The next prime is 99981697. The reversal of 99981654 is 45618999.

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

99981654 is an admirable number.

It is a super-2 number, since 2×99981654² = 19992662273151432, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 99981597 and 99981606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99981653) 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, 8331799 + ... + 8331810.

It is an arithmetic number, because the mean of its divisors is an integer number (24995415).

Almost surely, 2^99981654 is an apocalyptic number.

99981654 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99981654 is a wasteful number, since it uses less digits than its factorization.

99981654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16663614.

The product of its digits is 699840, while the sum is 51.

The square root of 99981654 is about 9999.0826579242. The cubic root of 99981654 is about 464.1304967624.

The spelling of 99981654 in words is "ninety-nine million, nine hundred eighty-one thousand, six hundred fifty-four".