213922837 has 4 divisors (see below), whose sum is σ = 214369920. Its totient is φ = 213475756.

The previous prime is 213922817. The next prime is 213922859. The reversal of 213922837 is 738229312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213922837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213922796 and 213922805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213922817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222823 + ... + 223780.

It is an arithmetic number, because the mean of its divisors is an integer number (53592480).

Almost surely, 2^213922837 is an apocalyptic number.

It is an amenable number.

213922837 is a deficient number, since it is larger than the sum of its proper divisors (447083).

213922837 is an equidigital number, since it uses as much as digits as its factorization.

213922837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447082.

The product of its digits is 36288, while the sum is 37.

The square root of 213922837 is about 14626.1012234977. The cubic root of 213922837 is about 598.0705026438.

It can be divided in two parts, 2139 and 22837, that added together give a triangular number (24976 = T₂₂₃).

The spelling of 213922837 in words is "two hundred thirteen million, nine hundred twenty-two thousand, eight hundred thirty-seven".