213459901 has 4 divisors (see below), whose sum is σ = 214738272. Its totient is φ = 212181532.

The previous prime is 213459887. The next prime is 213459913. The reversal of 213459901 is 109954312.

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 213459901 - 2⁷ = 213459773 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 (213459931) 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, 638935 + ... + 639268.

It is an arithmetic number, because the mean of its divisors is an integer number (53684568).

Almost surely, 2^213459901 is an apocalyptic number.

It is an amenable number.

213459901 is a deficient number, since it is larger than the sum of its proper divisors (1278371).

213459901 is a wasteful number, since it uses less digits than its factorization.

213459901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1278370.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 213459901 is about 14610.2669722357. The cubic root of 213459901 is about 597.6387763760.

The spelling of 213459901 in words is "two hundred thirteen million, four hundred fifty-nine thousand, nine hundred one".