997581299 has 8 divisors (see below), whose sum is σ = 1171983792. Its totient is φ = 837131040.

The previous prime is 997581293. The next prime is 997581307. The reversal of 997581299 is 992185799.

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 997581299 - 2⁸ = 997581043 is a prime.

It is a super-2 number, since 2×997581299² = 1990336896229054802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (997581293) 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, 3487904 + ... + 3488189.

It is an arithmetic number, because the mean of its divisors is an integer number (146497974).

Almost surely, 2^997581299 is an apocalyptic number.

997581299 is a deficient number, since it is larger than the sum of its proper divisors (174402493).

997581299 is a wasteful number, since it uses less digits than its factorization.

997581299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6976117.

The product of its digits is 3674160, while the sum is 59.

The square root of 997581299 is about 31584.5104283730. The cubic root of 997581299 is about 999.1931154458.

The spelling of 997581299 in words is "nine hundred ninety-seven million, five hundred eighty-one thousand, two hundred ninety-nine".