100870949 has 4 divisors (see below), whose sum is σ = 101090220. Its totient is φ = 100651680.

The previous prime is 100870927. The next prime is 100870963. The reversal of 100870949 is 949078001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42837025 + 58033924 = 6545^2 + 7618^2 .

It is a cyclic number.

It is not a de Polignac number, because 100870949 - 2¹⁶ = 100805413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100870999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108944 + ... + 109865.

It is an arithmetic number, because the mean of its divisors is an integer number (25272555).

Almost surely, 2^100870949 is an apocalyptic number.

It is an amenable number.

100870949 is a deficient number, since it is larger than the sum of its proper divisors (219271).

100870949 is an equidigital number, since it uses as much as digits as its factorization.

100870949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219270.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 100870949 is about 10043.4530416585. The cubic root of 100870949 is about 465.5025191352.

The spelling of 100870949 in words is "one hundred million, eight hundred seventy thousand, nine hundred forty-nine".