997291513 has 8 divisors (see below), whose sum is σ = 1069588800. Its totient is φ = 926975088.

The previous prime is 997291511. The next prime is 997291541. The reversal of 997291513 is 315192799.

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

It is not a de Polignac number, because 997291513 - 2¹ = 997291511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (997291511) 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, 494173 + ... + 496186.

It is an arithmetic number, because the mean of its divisors is an integer number (133698600).

Almost surely, 2^997291513 is an apocalyptic number.

It is an amenable number.

997291513 is a deficient number, since it is larger than the sum of its proper divisors (72297287).

997291513 is a wasteful number, since it uses less digits than its factorization.

997291513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990431.

The product of its digits is 153090, while the sum is 46.

The square root of 997291513 is about 31579.9226249844. The cubic root of 997291513 is about 999.0963546711.

The spelling of 997291513 in words is "nine hundred ninety-seven million, two hundred ninety-one thousand, five hundred thirteen".