212639492387 has 8 divisors (see below), whose sum is σ = 247135488000. Its totient is φ = 179173228104.

The previous prime is 212639492341. The next prime is 212639492399. The reversal of 212639492387 is 783294936212.

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 212639492387 - 2¹² = 212639488291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212639491387) 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, 257432387 + ... + 257433212.

It is an arithmetic number, because the mean of its divisors is an integer number (30891936000).

Almost surely, 2^212639492387 is an apocalyptic number.

212639492387 is a deficient number, since it is larger than the sum of its proper divisors (34495995613).

212639492387 is an equidigital number, since it uses as much as digits as its factorization.

212639492387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514865665.

The product of its digits is 7838208, while the sum is 56.

The spelling of 212639492387 in words is "two hundred twelve billion, six hundred thirty-nine million, four hundred ninety-two thousand, three hundred eighty-seven".