101930681 has 2 divisors, whose sum is σ = 101930682. Its totient is φ = 101930680.

The previous prime is 101930663. The next prime is 101930711. The reversal of 101930681 is 186039101.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101828281 + 102400 = 10091^2 + 320^2 .

It is a cyclic number.

It is not a de Polignac number, because 101930681 - 2⁶ = 101930617 is a prime.

It is a super-2 number, since 2×101930681² = 20779727458247522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (101930981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50965340 + 50965341.

It is an arithmetic number, because the mean of its divisors is an integer number (50965341).

Almost surely, 2^101930681 is an apocalyptic number.

It is an amenable number.

101930681 is a deficient number, since it is larger than the sum of its proper divisors (1).

101930681 is an equidigital number, since it uses as much as digits as its factorization.

101930681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 101930681 is about 10096.0725532258. The cubic root of 101930681 is about 467.1270053347.

Adding to 101930681 its reverse (186039101), we get a palindrome (287969782).

The spelling of 101930681 in words is "one hundred one million, nine hundred thirty thousand, six hundred eighty-one".