997471901 has 8 divisors (see below), whose sum is σ = 1001220000. Its totient is φ = 993731760.

The previous prime is 997471897. The next prime is 997471919. The reversal of 997471901 is 109174799.

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 997471901 - 2² = 997471897 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 (997471201) 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, 361475 + ... + 364223.

It is an arithmetic number, because the mean of its divisors is an integer number (125152500).

Almost surely, 2^997471901 is an apocalyptic number.

It is an amenable number.

997471901 is a deficient number, since it is larger than the sum of its proper divisors (3748099).

997471901 is a wasteful number, since it uses less digits than its factorization.

997471901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3979.

The product of its (nonzero) digits is 142884, while the sum is 47.

The square root of 997471901 is about 31582.7785509762. The cubic root of 997471901 is about 999.1565891915.

The spelling of 997471901 in words is "nine hundred ninety-seven million, four hundred seventy-one thousand, nine hundred one".