531897897394 has 8 divisors (see below), whose sum is σ = 797850109980. Its totient is φ = 265947860736.

The previous prime is 531897897373. The next prime is 531897897451. The reversal of 531897897394 is 493798798135.

It can be written as a sum of positive squares in 2 ways, for example, as 406501880625 + 125396016769 = 637575^2 + 354113^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 383202 + ... + 1100290.

Almost surely, 2^531897897394 is an apocalyptic number.

531897897394 is a deficient number, since it is larger than the sum of its proper divisors (265952212586).

531897897394 is a wasteful number, since it uses less digits than its factorization.

531897897394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087964.

The product of its digits is 411505920, while the sum is 73.

The spelling of 531897897394 in words is "five hundred thirty-one billion, eight hundred ninety-seven million, eight hundred ninety-seven thousand, three hundred ninety-four".