289137997 has 2 divisors, whose sum is σ = 289137998. Its totient is φ = 289137996.

The previous prime is 289137973. The next prime is 289138007. The reversal of 289137997 is 799731982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 157025961 + 132112036 = 12531^2 + 11494^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-289137997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (289135997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144568998 + 144568999.

It is an arithmetic number, because the mean of its divisors is an integer number (144568999).

Almost surely, 2^289137997 is an apocalyptic number.

It is an amenable number.

289137997 is a deficient number, since it is larger than the sum of its proper divisors (1).

289137997 is an equidigital number, since it uses as much as digits as its factorization.

289137997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1714608, while the sum is 55.

The square root of 289137997 is about 17004.0582509000. The cubic root of 289137997 is about 661.2541175864.

The spelling of 289137997 in words is "two hundred eighty-nine million, one hundred thirty-seven thousand, nine hundred ninety-seven".