35987989 has 2 divisors, whose sum is σ = 35987990. Its totient is φ = 35987988.

The previous prime is 35987977. The next prime is 35988019. The reversal of 35987989 is 98978953.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35307364 + 680625 = 5942^2 + 825^2 .

It is an emirp because it is prime and its reverse (98978953) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-35987989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (35981989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17993994 + 17993995.

It is an arithmetic number, because the mean of its divisors is an integer number (17993995).

Almost surely, 2^35987989 is an apocalyptic number.

It is an amenable number.

35987989 is a deficient number, since it is larger than the sum of its proper divisors (1).

35987989 is an equidigital number, since it uses as much as digits as its factorization.

35987989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4898880, while the sum is 58.

The square root of 35987989 is about 5998.9989998332. The cubic root of 35987989 is about 330.1559990935.

The spelling of 35987989 in words is "thirty-five million, nine hundred eighty-seven thousand, nine hundred eighty-nine".