102731066 has 16 divisors (see below), whose sum is σ = 158029704. Its totient is φ = 50067264.

The previous prime is 102731063. The next prime is 102731089. The reversal of 102731066 is 660137201.

It can be written as a sum of positive squares in 4 ways, for example, as 56776225 + 45954841 = 7535^2 + 6779^2 .

It is not an unprimeable number, because it can be changed into a prime (102731063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13556 + ... + 19728.

Almost surely, 2^102731066 is an apocalyptic number.

102731066 is a deficient number, since it is larger than the sum of its proper divisors (55298638).

102731066 is a wasteful number, since it uses less digits than its factorization.

102731066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6385.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 102731066 is about 10135.6334779825. The cubic root of 102731066 is about 468.3464847169.

Adding to 102731066 its reverse (660137201), we get a palindrome (762868267).

The spelling of 102731066 in words is "one hundred two million, seven hundred thirty-one thousand, sixty-six".