997350121 has 4 divisors (see below), whose sum is σ = 997420612. Its totient is φ = 997279632.

The previous prime is 997350113. The next prime is 997350139. The reversal of 997350121 is 121053799.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 117397225 + 879952896 = 10835^2 + 29664^2 .

It is a cyclic number.

It is not a de Polignac number, because 997350121 - 2³ = 997350113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (997350191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5850 + ... + 45043.

It is an arithmetic number, because the mean of its divisors is an integer number (249355153).

Almost surely, 2^997350121 is an apocalyptic number.

It is an amenable number.

997350121 is a deficient number, since it is larger than the sum of its proper divisors (70491).

997350121 is a wasteful number, since it uses less digits than its factorization.

997350121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70490.

The product of its (nonzero) digits is 17010, while the sum is 37.

The square root of 997350121 is about 31580.8505426944. The cubic root of 997350121 is about 999.1159256429.

The spelling of 997350121 in words is "nine hundred ninety-seven million, three hundred fifty thousand, one hundred twenty-one".