109620421 has 2 divisors, whose sum is σ = 109620422. Its totient is φ = 109620420.

The previous prime is 109620409. The next prime is 109620449. The reversal of 109620421 is 124026901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83722500 + 25897921 = 9150^2 + 5089^2 .

It is an emirp because it is prime and its reverse (124026901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 109620421 - 2¹¹ = 109618373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109620491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54810210 + 54810211.

It is an arithmetic number, because the mean of its divisors is an integer number (54810211).

Almost surely, 2^109620421 is an apocalyptic number.

It is an amenable number.

109620421 is a deficient number, since it is larger than the sum of its proper divisors (1).

109620421 is an equidigital number, since it uses as much as digits as its factorization.

109620421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 109620421 is about 10469.9771250944. The cubic root of 109620421 is about 478.5902225718.

The spelling of 109620421 in words is "one hundred nine million, six hundred twenty thousand, four hundred twenty-one".