214451989 has 2 divisors, whose sum is σ = 214451990. Its totient is φ = 214451988.

The previous prime is 214451981. The next prime is 214452001. The reversal of 214451989 is 989154412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 208571364 + 5880625 = 14442^2 + 2425^2 .

It is a cyclic number.

It is not a de Polignac number, because 214451989 - 2³ = 214451981 is a prime.

It is a super-2 number, since 2×214451989² = 91979311172112242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (214451981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107225994 + 107225995.

It is an arithmetic number, because the mean of its divisors is an integer number (107225995).

Almost surely, 2^214451989 is an apocalyptic number.

It is an amenable number.

214451989 is a deficient number, since it is larger than the sum of its proper divisors (1).

214451989 is an equidigital number, since it uses as much as digits as its factorization.

214451989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 43.

The square root of 214451989 is about 14644.1793556348. The cubic root of 214451989 is about 598.5632186601.

The spelling of 214451989 in words is "two hundred fourteen million, four hundred fifty-one thousand, nine hundred eighty-nine".