213740117 has 4 divisors (see below), whose sum is σ = 216930336. Its totient is φ = 210549900.

The previous prime is 213740113. The next prime is 213740119. The reversal of 213740117 is 711047312.

It is a happy number.

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 not a de Polignac number, because 213740117 - 2² = 213740113 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 (213740113) 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, 1595009 + ... + 1595142.

It is an arithmetic number, because the mean of its divisors is an integer number (54232584).

Almost surely, 2^213740117 is an apocalyptic number.

It is an amenable number.

213740117 is a deficient number, since it is larger than the sum of its proper divisors (3190219).

213740117 is an equidigital number, since it uses as much as digits as its factorization.

213740117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3190218.

The product of its (nonzero) digits is 1176, while the sum is 26.

The square root of 213740117 is about 14619.8535218380. The cubic root of 213740117 is about 597.9001755423.

Adding to 213740117 its reverse (711047312), we get a palindrome (924787429).

The spelling of 213740117 in words is "two hundred thirteen million, seven hundred forty thousand, one hundred seventeen".