213677905 has 16 divisors (see below), whose sum is σ = 296069760. Its totient is φ = 145009152.

The previous prime is 213677903. The next prime is 213677909. The reversal of 213677905 is 509776312.

It is a cyclic number.

It is not a de Polignac number, because 213677905 - 2¹ = 213677903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213677903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28075 + ... + 34864.

It is an arithmetic number, because the mean of its divisors is an integer number (18504360).

Almost surely, 2^213677905 is an apocalyptic number.

It is an amenable number.

213677905 is a deficient number, since it is larger than the sum of its proper divisors (82391855).

213677905 is an equidigital number, since it uses as much as digits as its factorization.

213677905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63048.

The product of its (nonzero) digits is 79380, while the sum is 40.

The square root of 213677905 is about 14617.7257122988. The cubic root of 213677905 is about 597.8421608909.

The spelling of 213677905 in words is "two hundred thirteen million, six hundred seventy-seven thousand, nine hundred five".