212940091 has 8 divisors (see below), whose sum is σ = 262080224. Its totient is φ = 168480000.

The previous prime is 212940089. The next prime is 212940109. The reversal of 212940091 is 190049212.

It is a happy number.

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

It is not a de Polignac number, because 212940091 - 2¹ = 212940089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212940031) 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, 1169910 + ... + 1170091.

It is an arithmetic number, because the mean of its divisors is an integer number (32760028).

Almost surely, 2^212940091 is an apocalyptic number.

212940091 is a deficient number, since it is larger than the sum of its proper divisors (49140133).

212940091 is a wasteful number, since it uses less digits than its factorization.

212940091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2340021.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 212940091 is about 14592.4669264659. The cubic root of 212940091 is about 597.1532657940.

The spelling of 212940091 in words is "two hundred twelve million, nine hundred forty thousand, ninety-one".