212973879 has 8 divisors (see below), whose sum is σ = 286893040. Its totient is φ = 140518656.

The previous prime is 212973853. The next prime is 212973913. The reversal of 212973879 is 978379212.

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

It is a de Polignac number, because none of the positive numbers 2^k-212973879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212973829) 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, 365644 + ... + 366225.

It is an arithmetic number, because the mean of its divisors is an integer number (35861630).

Almost surely, 2^212973879 is an apocalyptic number.

212973879 is a deficient number, since it is larger than the sum of its proper divisors (73919161).

212973879 is an equidigital number, since it uses as much as digits as its factorization.

212973879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731969.

The product of its digits is 381024, while the sum is 48.

The square root of 212973879 is about 14593.6246011743. The cubic root of 212973879 is about 597.1848483037.

The spelling of 212973879 in words is "two hundred twelve million, nine hundred seventy-three thousand, eight hundred seventy-nine".