868721415 has 8 divisors (see below), whose sum is σ = 1389954288. Its totient is φ = 463318080.

The previous prime is 868721411. The next prime is 868721443. The reversal of 868721415 is 514127868.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 868721415 - 2² = 868721411 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868721411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28957366 + ... + 28957395.

It is an arithmetic number, because the mean of its divisors is an integer number (173744286).

Almost surely, 2^868721415 is an apocalyptic number.

868721415 is a deficient number, since it is larger than the sum of its proper divisors (521232873).

868721415 is a wasteful number, since it uses less digits than its factorization.

868721415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57914769.

The product of its digits is 107520, while the sum is 42.

The square root of 868721415 is about 29474.0803927790. The cubic root of 868721415 is about 954.1723831350.

The spelling of 868721415 in words is "eight hundred sixty-eight million, seven hundred twenty-one thousand, four hundred fifteen".