997769807 has 8 divisors (see below), whose sum is σ = 1026685440. Its totient is φ = 969113880.

The previous prime is 997769783. The next prime is 997769821. The reversal of 997769807 is 708967799.

It is a happy number.

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 997769807 - 2¹² = 997765711 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 997769807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997769897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57119 + ... + 72512.

It is an arithmetic number, because the mean of its divisors is an integer number (128335680).

Almost surely, 2^997769807 is an apocalyptic number.

997769807 is a deficient number, since it is larger than the sum of its proper divisors (28915633).

997769807 is a wasteful number, since it uses less digits than its factorization.

997769807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129853.

The product of its (nonzero) digits is 12002256, while the sum is 62.

The square root of 997769807 is about 31587.4944717051. The cubic root of 997769807 is about 999.2560490075.

The spelling of 997769807 in words is "nine hundred ninety-seven million, seven hundred sixty-nine thousand, eight hundred seven".