211420389 has 8 divisors (see below), whose sum is σ = 282336192. Its totient is φ = 140725760.

The previous prime is 211420373. The next prime is 211420399. The reversal of 211420389 is 983024112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211420389 - 2⁴ = 211420373 is a prime.

It is a super-2 number, since 2×211420389² = 89397161769822642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211420369) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53049 + ... + 56894.

It is an arithmetic number, because the mean of its divisors is an integer number (35292024).

Almost surely, 2^211420389 is an apocalyptic number.

It is an amenable number.

211420389 is a deficient number, since it is larger than the sum of its proper divisors (70915803).

211420389 is a wasteful number, since it uses less digits than its factorization.

211420389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110587.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 211420389 is about 14540.3022320721. The cubic root of 211420389 is about 595.7292933421.

The spelling of 211420389 in words is "two hundred eleven million, four hundred twenty thousand, three hundred eighty-nine".