868988457 has 6 divisors (see below), whose sum is σ = 1255205562. Its totient is φ = 579325632.

The previous prime is 868988447. The next prime is 868988467. The reversal of 868988457 is 754889868.

It is an interprime number because it is at equal distance from previous prime (868988447) and next prime (868988467).

It can be written as a sum of positive squares in only one way, i.e., 833419161 + 35569296 = 28869^2 + 5964^2 .

It is not a de Polignac number, because 868988457 - 2⁴ = 868988441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 868988394 and 868988403.

It is not an unprimeable number, because it can be changed into a prime (868988437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 48277128 + ... + 48277145.

It is an arithmetic number, because the mean of its divisors is an integer number (209200927).

Almost surely, 2^868988457 is an apocalyptic number.

It is an amenable number.

868988457 is a deficient number, since it is larger than the sum of its proper divisors (386217105).

868988457 is a wasteful number, since it uses less digits than its factorization.

868988457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96554279 (or 96554276 counting only the distinct ones).

The product of its digits is 30965760, while the sum is 63.

The square root of 868988457 is about 29478.6101605893. The cubic root of 868988457 is about 954.2701428974.

The spelling of 868988457 in words is "eight hundred sixty-eight million, nine hundred eighty-eight thousand, four hundred fifty-seven".