212890623 has 8 divisors (see below), whose sum is σ = 309659136. Its totient is φ = 129024600.

The previous prime is 212890621. The next prime is 212890631. The reversal of 212890623 is 326098212.

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 212890623 - 2¹ = 212890621 is a prime.

It is a super-2 number, since 2×212890623² = 90644834722656258, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 6451231 = 212890623 / (2 + 1 + 2 + 8 + 9 + 0 + 6 + 2 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212890621) 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, 3225583 + ... + 3225648.

It is an arithmetic number, because the mean of its divisors is an integer number (38707392).

Almost surely, 2^212890623 is an apocalyptic number.

212890623 is a deficient number, since it is larger than the sum of its proper divisors (96768513).

212890623 is a wasteful number, since it uses less digits than its factorization.

212890623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6451245.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 212890623 is about 14590.7718438745. The cubic root of 212890623 is about 597.1070207595.

The spelling of 212890623 in words is "two hundred twelve million, eight hundred ninety thousand, six hundred twenty-three".