213900669 has 10 divisors (see below), whose sum is σ = 319530750. Its totient is φ = 142600392.

The previous prime is 213900601. The next prime is 213900671. The reversal of 213900669 is 966009312.

It can be written as a sum of positive squares in only one way, i.e., 176225625 + 37675044 = 13275^2 + 6138^2 .

It is not a de Polignac number, because 213900669 - 2¹⁶ = 213835133 is a prime.

It is a super-2 number, since 2×213900669² = 91506992397295122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213900469) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1320294 + ... + 1320455.

It is an arithmetic number, because the mean of its divisors is an integer number (31953075).

Almost surely, 2^213900669 is an apocalyptic number.

It is an amenable number.

213900669 is a deficient number, since it is larger than the sum of its proper divisors (105630081).

213900669 is an equidigital number, since it uses as much as digits as its factorization.

213900669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2640761 (or 2640752 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 213900669 is about 14625.3433805843. The cubic root of 213900669 is about 598.0498433490.

The spelling of 213900669 in words is "two hundred thirteen million, nine hundred thousand, six hundred sixty-nine".