997309079 has 8 divisors (see below), whose sum is σ = 1074593520. Its totient is φ = 920105856.

The previous prime is 997309067. The next prime is 997309111. The reversal of 997309079 is 970903799.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-997309079 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 997309079.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997309039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6527 + ... + 45135.

It is an arithmetic number, because the mean of its divisors is an integer number (134324190).

Almost surely, 2^997309079 is an apocalyptic number.

997309079 is a deficient number, since it is larger than the sum of its proper divisors (77284441).

997309079 is a wasteful number, since it uses less digits than its factorization.

997309079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40609.

The product of its (nonzero) digits is 964467, while the sum is 53.

The square root of 997309079 is about 31580.2007435038. The cubic root of 997309079 is about 999.1022205666.

The spelling of 997309079 in words is "nine hundred ninety-seven million, three hundred nine thousand, seventy-nine".