206880457 has 4 divisors (see below), whose sum is σ = 236434816. Its totient is φ = 177326100.

The previous prime is 206880409. The next prime is 206880521. The reversal of 206880457 is 754088602.

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 not a de Polignac number, because 206880457 - 2¹⁵ = 206847689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206880407) 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, 14777169 + ... + 14777182.

It is an arithmetic number, because the mean of its divisors is an integer number (59108704).

Almost surely, 2^206880457 is an apocalyptic number.

It is an amenable number.

206880457 is a deficient number, since it is larger than the sum of its proper divisors (29554359).

206880457 is an equidigital number, since it uses as much as digits as its factorization.

206880457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29554358.

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 206880457 is about 14383.3395635367. The cubic root of 206880457 is about 591.4342745433.

The spelling of 206880457 in words is "two hundred six million, eight hundred eighty thousand, four hundred fifty-seven".