213773997 has 16 divisors (see below), whose sum is σ = 317684160. Its totient is φ = 127072512.

The previous prime is 213773977. The next prime is 213773999. The reversal of 213773997 is 799377312.

It is not a de Polignac number, because 213773997 - 2¹⁴ = 213757613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213773999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109338 + ... + 111275.

It is an arithmetic number, because the mean of its divisors is an integer number (19855260).

Almost surely, 2^213773997 is an apocalyptic number.

It is an amenable number.

213773997 is a deficient number, since it is larger than the sum of its proper divisors (103910163).

213773997 is a wasteful number, since it uses less digits than its factorization.

213773997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220652.

The product of its digits is 500094, while the sum is 48.

The square root of 213773997 is about 14621.0121742648. The cubic root of 213773997 is about 597.9317649760.

The spelling of 213773997 in words is "two hundred thirteen million, seven hundred seventy-three thousand, nine hundred ninety-seven".