206120957 has 4 divisors (see below), whose sum is σ = 235566816. Its totient is φ = 176675100.

The previous prime is 206120947. The next prime is 206120989. The reversal of 206120957 is 759021602.

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 206120957 - 2¹⁴ = 206104573 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 (206120947) 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, 14722919 + ... + 14722932.

It is an arithmetic number, because the mean of its divisors is an integer number (58891704).

Almost surely, 2^206120957 is an apocalyptic number.

It is an amenable number.

206120957 is a deficient number, since it is larger than the sum of its proper divisors (29445859).

206120957 is an equidigital number, since it uses as much as digits as its factorization.

206120957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29445858.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 206120957 is about 14356.9132128045. The cubic root of 206120957 is about 590.7096287642.

The spelling of 206120957 in words is "two hundred six million, one hundred twenty thousand, nine hundred fifty-seven".