868472397 has 12 divisors (see below), whose sum is σ = 1350957244. Its totient is φ = 534444480.

The previous prime is 868472393. The next prime is 868472411. The reversal of 868472397 is 793274868.

868472397 is a `hidden beast` number, since 86 + 8 + 472 + 3 + 97 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 228432996 + 640039401 = 15114^2 + 25299^2 .

It is not a de Polignac number, because 868472397 - 2² = 868472393 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868472393) 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 11 ways as a sum of consecutive naturals, for example, 3711304 + ... + 3711537.

Almost surely, 2^868472397 is an apocalyptic number.

It is an amenable number.

868472397 is a deficient number, since it is larger than the sum of its proper divisors (482484847).

868472397 is a wasteful number, since it uses less digits than its factorization.

868472397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7422860 (or 7422857 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 54.

The square root of 868472397 is about 29469.8557342923. The cubic root of 868472397 is about 954.0812036148.

The spelling of 868472397 in words is "eight hundred sixty-eight million, four hundred seventy-two thousand, three hundred ninety-seven".