100920980 has 12 divisors (see below), whose sum is σ = 211934100. Its totient is φ = 40368384.

The previous prime is 100920979. The next prime is 100920991. The reversal of 100920980 is 89029001.

It can be written as a sum of positive squares in 2 ways, for example, as 67141636 + 33779344 = 8194^2 + 5812^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2523005 + ... + 2523044.

It is an arithmetic number, because the mean of its divisors is an integer number (17661175).

Almost surely, 2^100920980 is an apocalyptic number.

100920980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100920980 is an abundant number, since it is smaller than the sum of its proper divisors (111013120).

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

100920980 is a wasteful number, since it uses less digits than its factorization.

100920980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5046058 (or 5046056 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 100920980 is about 10045.9434599245. The cubic root of 100920980 is about 465.5794679739.

Adding to 100920980 its reverse (89029001), we get a palindrome (189949981).

The spelling of 100920980 in words is "one hundred million, nine hundred twenty thousand, nine hundred eighty".