212923654 has 4 divisors (see below), whose sum is σ = 319385484. Its totient is φ = 106461826.

The previous prime is 212923609. The next prime is 212923679. The reversal of 212923654 is 456329212.

It is a semiprime because it is the product of two primes.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53230912 + ... + 53230915.

It is an arithmetic number, because the mean of its divisors is an integer number (79846371).

Almost surely, 2^212923654 is an apocalyptic number.

212923654 is a deficient number, since it is larger than the sum of its proper divisors (106461830).

212923654 is a wasteful number, since it uses less digits than its factorization.

212923654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106461829.

The product of its digits is 25920, while the sum is 34.

The square root of 212923654 is about 14591.9037140464. The cubic root of 212923654 is about 597.1379005008.

The spelling of 212923654 in words is "two hundred twelve million, nine hundred twenty-three thousand, six hundred fifty-four".