289285157 has 4 divisors (see below), whose sum is σ = 330611616. Its totient is φ = 247958700.

The previous prime is 289285153. The next prime is 289285177. The reversal of 289285157 is 751582982.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 289285157 - 2² = 289285153 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 (289285151) 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, 20663219 + ... + 20663232.

It is an arithmetic number, because the mean of its divisors is an integer number (82652904).

Almost surely, 2^289285157 is an apocalyptic number.

It is an amenable number.

289285157 is a deficient number, since it is larger than the sum of its proper divisors (41326459).

289285157 is an equidigital number, since it uses as much as digits as its factorization.

289285157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41326458.

The product of its digits is 403200, while the sum is 47.

The square root of 289285157 is about 17008.3849027472. The cubic root of 289285157 is about 661.3662827723.

The spelling of 289285157 in words is "two hundred eighty-nine million, two hundred eighty-five thousand, one hundred fifty-seven".