321400099 has 2 divisors, whose sum is σ = 321400100. Its totient is φ = 321400098.

The previous prime is 321400097. The next prime is 321400117. The reversal of 321400099 is 990004123.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 321400099 - 2¹ = 321400097 is a prime.

Together with 321400097, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (321400097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160700049 + 160700050.

It is an arithmetic number, because the mean of its divisors is an integer number (160700050).

Almost surely, 2^321400099 is an apocalyptic number.

321400099 is a deficient number, since it is larger than the sum of its proper divisors (1).

321400099 is an equidigital number, since it uses as much as digits as its factorization.

321400099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 321400099 is about 17927.6350643357. The cubic root of 321400099 is about 684.9864838294.

The spelling of 321400099 in words is "three hundred twenty-one million, four hundred thousand, ninety-nine".