397142864287 has 16 divisors (see below), whose sum is σ = 428393750400. Its totient is φ = 365992687872.

The previous prime is 397142864249. The next prime is 397142864297. The reversal of 397142864287 is 782468241793.

It is a cyclic number.

It is not a de Polignac number, because 397142864287 - 2³¹ = 394995380639 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 (397142864297) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21578173 + ... + 21596569.

It is an arithmetic number, because the mean of its divisors is an integer number (26774609400).

Almost surely, 2^397142864287 is an apocalyptic number.

397142864287 is a deficient number, since it is larger than the sum of its proper divisors (31250886113).

397142864287 is a wasteful number, since it uses less digits than its factorization.

397142864287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21042.

The product of its digits is 32514048, while the sum is 61.

The spelling of 397142864287 in words is "three hundred ninety-seven billion, one hundred forty-two million, eight hundred sixty-four thousand, two hundred eighty-seven".