212992387 has 8 divisors (see below), whose sum is σ = 219011936. Its totient is φ = 206986752.

The previous prime is 212992379. The next prime is 212992421. The reversal of 212992387 is 783299212.

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 212992387 - 2³ = 212992379 is a prime.

It is a super-3 number, since 3×212992387³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212992987) 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, 32803 + ... + 38755.

It is an arithmetic number, because the mean of its divisors is an integer number (27376492).

Almost surely, 2^212992387 is an apocalyptic number.

212992387 is a deficient number, since it is larger than the sum of its proper divisors (6019549).

212992387 is an equidigital number, since it uses as much as digits as its factorization.

212992387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6957.

The product of its digits is 108864, while the sum is 43.

The square root of 212992387 is about 14594.2586999135. The cubic root of 212992387 is about 597.2021467897.

The spelling of 212992387 in words is "two hundred twelve million, nine hundred ninety-two thousand, three hundred eighty-seven".