214401391 has 2 divisors, whose sum is σ = 214401392. Its totient is φ = 214401390.

The previous prime is 214401373. The next prime is 214401431. The reversal of 214401391 is 193104412.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 214401391 - 2⁵ = 214401359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (214401361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107200695 + 107200696.

It is an arithmetic number, because the mean of its divisors is an integer number (107200696).

Almost surely, 2^214401391 is an apocalyptic number.

214401391 is a deficient number, since it is larger than the sum of its proper divisors (1).

214401391 is an equidigital number, since it uses as much as digits as its factorization.

214401391 is an odious number, because the sum of its binary digits is odd.

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

The square root of 214401391 is about 14642.4516731318. The cubic root of 214401391 is about 598.5161397714.

The spelling of 214401391 in words is "two hundred fourteen million, four hundred one thousand, three hundred ninety-one".