997381567 has 8 divisors (see below), whose sum is σ = 1227546656. Its totient is φ = 789136992.

The previous prime is 997381559. The next prime is 997381571. The reversal of 997381567 is 765183799.

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

It is not a de Polignac number, because 997381567 - 2³ = 997381559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997381267) 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, 5480028 + ... + 5480209.

It is an arithmetic number, because the mean of its divisors is an integer number (153443332).

Almost surely, 2^997381567 is an apocalyptic number.

997381567 is the 18234-th hex number.

997381567 is a deficient number, since it is larger than the sum of its proper divisors (230165089).

997381567 is a wasteful number, since it uses less digits than its factorization.

997381567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10960257.

The product of its digits is 2857680, while the sum is 55.

The square root of 997381567 is about 31581.3484037652. The cubic root of 997381567 is about 999.1264260908.

The spelling of 997381567 in words is "nine hundred ninety-seven million, three hundred eighty-one thousand, five hundred sixty-seven".