897131262719 has 4 divisors (see below), whose sum is σ = 897133510896. Its totient is φ = 897129014544.

The previous prime is 897131262697. The next prime is 897131262737. The reversal of 897131262719 is 917262131798.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 917262131798 = 2 ⋅458631065899.

It is a cyclic number.

It is not a de Polignac number, because 897131262719 - 2⁸ = 897131262463 is a prime.

It is a super-2 number, since 2×897131262719² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (897131862719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 345974 + ... + 1383459.

It is an arithmetic number, because the mean of its divisors is an integer number (224283377724).

Almost surely, 2^897131262719 is an apocalyptic number.

897131262719 is a deficient number, since it is larger than the sum of its proper divisors (2248177).

897131262719 is a wasteful number, since it uses less digits than its factorization.

897131262719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2248176.

The product of its digits is 2286144, while the sum is 56.

The spelling of 897131262719 in words is "eight hundred ninety-seven billion, one hundred thirty-one million, two hundred sixty-two thousand, seven hundred nineteen".