997649071 has 8 divisors (see below), whose sum is σ = 1004590080. Its totient is φ = 990732288.

The previous prime is 997649069. The next prime is 997649087. The reversal of 997649071 is 170946799.

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 997649071 - 2¹ = 997649069 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 (997649021) 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, 80850 + ... + 92368.

It is an arithmetic number, because the mean of its divisors is an integer number (125573760).

Almost surely, 2^997649071 is an apocalyptic number.

997649071 is a deficient number, since it is larger than the sum of its proper divisors (6941009).

997649071 is a wasteful number, since it uses less digits than its factorization.

997649071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12113.

The product of its (nonzero) digits is 857304, while the sum is 52.

The square root of 997649071 is about 31585.5832778184. The cubic root of 997649071 is about 999.2157421003.

The spelling of 997649071 in words is "nine hundred ninety-seven million, six hundred forty-nine thousand, seventy-one".