213940773 has 6 divisors (see below), whose sum is σ = 309025574. Its totient is φ = 142627176.

The previous prime is 213940763. The next prime is 213940777. The reversal of 213940773 is 377049312.

It can be written as a sum of positive squares in only one way, i.e., 108118404 + 105822369 = 10398^2 + 10287^2 .

It is not a de Polignac number, because 213940773 - 2⁶ = 213940709 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 (213940777) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11885590 + ... + 11885607.

Almost surely, 2^213940773 is an apocalyptic number.

It is an amenable number.

213940773 is a deficient number, since it is larger than the sum of its proper divisors (95084801).

213940773 is a wasteful number, since it uses less digits than its factorization.

213940773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23771203 (or 23771200 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 36.

The square root of 213940773 is about 14626.7143610587. The cubic root of 213940773 is about 598.0872169148.

The spelling of 213940773 in words is "two hundred thirteen million, nine hundred forty thousand, seven hundred seventy-three".