2169340421 has 2 divisors, whose sum is σ = 2169340422. Its totient is φ = 2169340420.

The previous prime is 2169340399. The next prime is 2169340423. The reversal of 2169340421 is 1240439612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1867449796 + 301890625 = 43214^2 + 17375^2 .

It is a cyclic number.

It is not a de Polignac number, because 2169340421 - 2¹⁴ = 2169324037 is a prime.

Together with 2169340423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2169340423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1084670210 + 1084670211.

It is an arithmetic number, because the mean of its divisors is an integer number (1084670211).

Almost surely, 2^2169340421 is an apocalyptic number.

It is an amenable number.

2169340421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2169340421 is an equidigital number, since it uses as much as digits as its factorization.

2169340421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 2169340421 is about 46576.1786861052. The cubic root of 2169340421 is about 1294.5214057116.

The spelling of 2169340421 in words is "two billion, one hundred sixty-nine million, three hundred forty thousand, four hundred twenty-one".