213620989 has 8 divisors (see below), whose sum is σ = 221184000. Its totient is φ = 206071152.

The previous prime is 213620909. The next prime is 213620993. The reversal of 213620989 is 989026312.

It is a happy number.

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 213620989 - 2¹¹ = 213618941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213620909) 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, 39172 + ... + 44290.

It is an arithmetic number, because the mean of its divisors is an integer number (27648000).

Almost surely, 2^213620989 is an apocalyptic number.

213620989 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

213620989 is a deficient number, since it is larger than the sum of its proper divisors (7563011).

213620989 is a wasteful number, since it uses less digits than its factorization.

213620989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6587.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 213620989 is about 14615.7787681670. The cubic root of 213620989 is about 597.7890750621.

The spelling of 213620989 in words is "two hundred thirteen million, six hundred twenty thousand, nine hundred eighty-nine".