107289781 has 2 divisors, whose sum is σ = 107289782. Its totient is φ = 107289780.

The previous prime is 107289757. The next prime is 107289797. The reversal of 107289781 is 187982701.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107122500 + 167281 = 10350^2 + 409^2 .

It is a cyclic number.

It is not a de Polignac number, because 107289781 - 2⁹ = 107289269 is a prime.

It is a super-2 number, since 2×107289781² = 23022194214055922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (107280781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53644890 + 53644891.

It is an arithmetic number, because the mean of its divisors is an integer number (53644891).

Almost surely, 2^107289781 is an apocalyptic number.

It is an amenable number.

107289781 is a deficient number, since it is larger than the sum of its proper divisors (1).

107289781 is an equidigital number, since it uses as much as digits as its factorization.

107289781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 43.

The square root of 107289781 is about 10358.0780553151. The cubic root of 107289781 is about 475.1741278493.

The spelling of 107289781 in words is "one hundred seven million, two hundred eighty-nine thousand, seven hundred eighty-one".