107684821 has 4 divisors (see below), whose sum is σ = 109048000. Its totient is φ = 106321644.

The previous prime is 107684813. The next prime is 107684839. The reversal of 107684821 is 128486701.

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: 128486701 = 7 ⋅18355243.

It is a cyclic number.

It is not a de Polignac number, because 107684821 - 2³ = 107684813 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 (107684881) 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, 681471 + ... + 681628.

It is an arithmetic number, because the mean of its divisors is an integer number (27262000).

Almost surely, 2^107684821 is an apocalyptic number.

It is an amenable number.

107684821 is a deficient number, since it is larger than the sum of its proper divisors (1363179).

107684821 is an equidigital number, since it uses as much as digits as its factorization.

107684821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1363178.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 107684821 is about 10377.1297091248. The cubic root of 107684821 is about 475.7566091451.

The spelling of 107684821 in words is "one hundred seven million, six hundred eighty-four thousand, eight hundred twenty-one".