104501981 has 4 divisors (see below), whose sum is σ = 104602464. Its totient is φ = 104401500.

The previous prime is 104501963. The next prime is 104501983. The reversal of 104501981 is 189105401.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 189105401 = 157 ⋅1204493.

It is a cyclic number.

It is not a de Polignac number, because 104501981 - 2¹⁴ = 104485597 is a prime.

It is a super-2 number, since 2×104501981² = 21841328065848722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104501983) 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, 48665 + ... + 50766.

It is an arithmetic number, because the mean of its divisors is an integer number (26150616).

Almost surely, 2^104501981 is an apocalyptic number.

It is an amenable number.

104501981 is a deficient number, since it is larger than the sum of its proper divisors (100483).

104501981 is an equidigital number, since it uses as much as digits as its factorization.

104501981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100482.

The product of its (nonzero) digits is 1440, while the sum is 29.

The square root of 104501981 is about 10222.6210435485. The cubic root of 104501981 is about 471.0223422701.

The spelling of 104501981 in words is "one hundred four million, five hundred one thousand, nine hundred eighty-one".