106637989 has 2 divisors, whose sum is σ = 106637990. Its totient is φ = 106637988.

The previous prime is 106637983. The next prime is 106638029. The reversal of 106637989 is 989736601.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63473089 + 43164900 = 7967^2 + 6570^2 .

It is a cyclic number.

It is not a de Polignac number, because 106637989 - 2³ = 106637981 is a prime.

It is a super-2 number, since 2×106637989² = 22743321395928242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (106637981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53318994 + 53318995.

It is an arithmetic number, because the mean of its divisors is an integer number (53318995).

Almost surely, 2^106637989 is an apocalyptic number.

It is an amenable number.

106637989 is a deficient number, since it is larger than the sum of its proper divisors (1).

106637989 is an equidigital number, since it uses as much as digits as its factorization.

106637989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 106637989 is about 10326.5671449906. The cubic root of 106637989 is about 474.2099353723.

The spelling of 106637989 in words is "one hundred six million, six hundred thirty-seven thousand, nine hundred eighty-nine".