1206731957 has 2 divisors, whose sum is σ = 1206731958. Its totient is φ = 1206731956.

The previous prime is 1206731923. The next prime is 1206731969. The reversal of 1206731957 is 7591376021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 991053361 + 215678596 = 31481^2 + 14686^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1206731957 is a prime.

It is a super-3 number, since 3×1206731957³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1206730957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 603365978 + 603365979.

It is an arithmetic number, because the mean of its divisors is an integer number (603365979).

Almost surely, 2^1206731957 is an apocalyptic number.

It is an amenable number.

1206731957 is a deficient number, since it is larger than the sum of its proper divisors (1).

1206731957 is an equidigital number, since it uses as much as digits as its factorization.

1206731957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 79380, while the sum is 41.

The square root of 1206731957 is about 34738.0476854990. The cubic root of 1206731957 is about 1064.6420235890.

The spelling of 1206731957 in words is "one billion, two hundred six million, seven hundred thirty-one thousand, nine hundred fifty-seven".