997349887 has 8 divisors (see below), whose sum is σ = 1054634112. Its totient is φ = 941635200.

The previous prime is 997349867. The next prime is 997349953. The reversal of 997349887 is 788943799.

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-997349887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997349807) 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, 391078 + ... + 393619.

It is an arithmetic number, because the mean of its divisors is an integer number (131829264).

Almost surely, 2^997349887 is an apocalyptic number.

997349887 is a deficient number, since it is larger than the sum of its proper divisors (57284225).

997349887 is a wasteful number, since it uses less digits than its factorization.

997349887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784769.

The product of its digits is 27433728, while the sum is 64.

The square root of 997349887 is about 31580.8468379174. The cubic root of 997349887 is about 999.1158475048.

The spelling of 997349887 in words is "nine hundred ninety-seven million, three hundred forty-nine thousand, eight hundred eighty-seven".