213400669 has 4 divisors (see below), whose sum is σ = 213642144. Its totient is φ = 213159196.

The previous prime is 213400661. The next prime is 213400687. The reversal of 213400669 is 966004312.

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 213400669 - 2³ = 213400661 is a prime.

It is a super-2 number, since 2×213400669² = 91079691059295122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213400669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213400661) 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, 119407 + ... + 121180.

It is an arithmetic number, because the mean of its divisors is an integer number (53410536).

Almost surely, 2^213400669 is an apocalyptic number.

It is an amenable number.

213400669 is a deficient number, since it is larger than the sum of its proper divisors (241475).

213400669 is an equidigital number, since it uses as much as digits as its factorization.

213400669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241474.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 213400669 is about 14608.2397639141. The cubic root of 213400669 is about 597.5834925895.

The spelling of 213400669 in words is "two hundred thirteen million, four hundred thousand, six hundred sixty-nine".