997429277999 has 12 divisors (see below), whose sum is σ = 1265754409128. Its totient is φ = 777217618800.

The previous prime is 997429277987. The next prime is 997429278017. The reversal of 997429277999 is 999772924799.

It is a de Polignac number, because none of the positive numbers 2^k-997429277999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997429277099) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 925258532 + ... + 925259609.

It is an arithmetic number, because the mean of its divisors is an integer number (105479534094).

Almost surely, 2^997429277999 is an apocalyptic number.

997429277999 is a deficient number, since it is larger than the sum of its proper divisors (268325131129).

997429277999 is a wasteful number, since it uses less digits than its factorization.

997429277999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1850518166 (or 1850518159 counting only the distinct ones).

The product of its digits is 2916548208, while the sum is 83.

The spelling of 997429277999 in words is "nine hundred ninety-seven billion, four hundred twenty-nine million, two hundred seventy-seven thousand, nine hundred ninety-nine".