107691989 has 2 divisors, whose sum is σ = 107691990. Its totient is φ = 107691988.

The previous prime is 107691973. The next prime is 107692007. The reversal of 107691989 is 989196701.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93122500 + 14569489 = 9650^2 + 3817^2 .

It is a cyclic number.

It is not a de Polignac number, because 107691989 - 2⁴ = 107691973 is a prime.

It is a super-2 number, since 2×107691989² = 23195128989552242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (107621989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53845994 + 53845995.

It is an arithmetic number, because the mean of its divisors is an integer number (53845995).

Almost surely, 2^107691989 is an apocalyptic number.

It is an amenable number.

107691989 is a deficient number, since it is larger than the sum of its proper divisors (1).

107691989 is an equidigital number, since it uses as much as digits as its factorization.

107691989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 244944, while the sum is 50.

The square root of 107691989 is about 10377.4750782645. The cubic root of 107691989 is about 475.7671650980.

The spelling of 107691989 in words is "one hundred seven million, six hundred ninety-one thousand, nine hundred eighty-nine".