206049931 has 2 divisors, whose sum is σ = 206049932. Its totient is φ = 206049930.

The previous prime is 206049923. The next prime is 206049941. The reversal of 206049931 is 139940602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 206049931 - 2³ = 206049923 is a prime.

It is a super-2 number, since 2×206049931² = 84913148130209522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (206049941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103024965 + 103024966.

It is an arithmetic number, because the mean of its divisors is an integer number (103024966).

Almost surely, 2^206049931 is an apocalyptic number.

206049931 is a deficient number, since it is larger than the sum of its proper divisors (1).

206049931 is an equidigital number, since it uses as much as digits as its factorization.

206049931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 206049931 is about 14354.4394178247. The cubic root of 206049931 is about 590.6417712584.

The spelling of 206049931 in words is "two hundred six million, forty-nine thousand, nine hundred thirty-one".