289420497 has 6 divisors (see below), whose sum is σ = 418051842. Its totient is φ = 192946992.

The previous prime is 289420463. The next prime is 289420507. The reversal of 289420497 is 794024982.

It can be written as a sum of positive squares in only one way, i.e., 167340096 + 122080401 = 12936^2 + 11049^2 .

It is not a de Polignac number, because 289420497 - 2¹² = 289416401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (289420447) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16078908 + ... + 16078925.

It is an arithmetic number, because the mean of its divisors is an integer number (69675307).

Almost surely, 2^289420497 is an apocalyptic number.

It is an amenable number.

289420497 is a deficient number, since it is larger than the sum of its proper divisors (128631345).

289420497 is a wasteful number, since it uses less digits than its factorization.

289420497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32157839 (or 32157836 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 289420497 is about 17012.3630633725. The cubic root of 289420497 is about 661.4694051937.

The spelling of 289420497 in words is "two hundred eighty-nine million, four hundred twenty thousand, four hundred ninety-seven".