289397487 has 4 divisors (see below), whose sum is σ = 385863320. Its totient is φ = 192931656.

The previous prime is 289397447. The next prime is 289397489. The reversal of 289397487 is 784793982.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 289397487 - 2⁸ = 289397231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289397489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48232912 + ... + 48232917.

It is an arithmetic number, because the mean of its divisors is an integer number (96465830).

Almost surely, 2^289397487 is an apocalyptic number.

289397487 is a deficient number, since it is larger than the sum of its proper divisors (96465833).

289397487 is an equidigital number, since it uses as much as digits as its factorization.

289397487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96465832.

The product of its digits is 6096384, while the sum is 57.

The square root of 289397487 is about 17011.6867770365. The cubic root of 289397487 is about 661.4518749743.

The spelling of 289397487 in words is "two hundred eighty-nine million, three hundred ninety-seven thousand, four hundred eighty-seven".