997416787831 has 8 divisors (see below), whose sum is σ = 1076671795680. Its totient is φ = 921152535072.

The previous prime is 997416787823. The next prime is 997416787853. The reversal of 997416787831 is 138787614799.

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

It is a cyclic number.

It is not a de Polignac number, because 997416787831 - 2³ = 997416787823 is a prime.

It is a super-2 number, since 2×997416787831² (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 (997416787811) 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, 747688080 + ... + 747689413.

It is an arithmetic number, because the mean of its divisors is an integer number (134583974460).

Almost surely, 2^997416787831 is an apocalyptic number.

997416787831 is a deficient number, since it is larger than the sum of its proper divisors (79255007849).

997416787831 is a wasteful number, since it uses less digits than its factorization.

997416787831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1495377545.

The product of its digits is 128024064, while the sum is 70.

The spelling of 997416787831 in words is "nine hundred ninety-seven billion, four hundred sixteen million, seven hundred eighty-seven thousand, eight hundred thirty-one".