997809119 has 8 divisors (see below), whose sum is σ = 1033074000.
Its totient is φ = 962601472.
The previous prime is 997809103. The next prime is 997809139. The reversal of 997809119 is 911908799.
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 997809119 - 24 = 997809103 is a prime.
It is a super-2 number, since 2×9978091192 = 1991246075919112322, which 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 (997809139) 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, 22847 + ... + 50175.
It is an arithmetic number, because the mean of its divisors is an integer number (129134250).
It is the magic constant of a 1259 × 1259 magic square.
Almost surely, 2997809119 is an apocalyptic number.
997809119 is a deficient number, since it is larger than the sum of its proper divisors (35264881).
997809119 is a wasteful number, since it uses less digits than its factorization.
997809119 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 28617.
The product of its (nonzero) digits is 367416, while the sum is 53.
The square root of 997809119 is about 31588.1167371529.
The cubic root of 997809119 is about 999.2691723544.
The spelling of 997809119 in words is "nine hundred ninety-seven million, eight hundred nine thousand, one hundred nineteen".