213459657 has 4 divisors (see below), whose sum is σ = 284612880. Its totient is φ = 142306436.

The previous prime is 213459643. The next prime is 213459671. The reversal of 213459657 is 756954312.

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 an interprime number because it is at equal distance from previous prime (213459643) and next prime (213459671).

It is a cyclic number.

It is not a de Polignac number, because 213459657 - 2⁴ = 213459641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213459607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35576607 + ... + 35576612.

It is an arithmetic number, because the mean of its divisors is an integer number (71153220).

Almost surely, 2^213459657 is an apocalyptic number.

It is an amenable number.

213459657 is a deficient number, since it is larger than the sum of its proper divisors (71153223).

213459657 is an equidigital number, since it uses as much as digits as its factorization.

213459657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71153222.

The product of its digits is 226800, while the sum is 42.

The square root of 213459657 is about 14610.2586219410. The cubic root of 213459657 is about 597.6385486613.

The spelling of 213459657 in words is "two hundred thirteen million, four hundred fifty-nine thousand, six hundred fifty-seven".