997383534 has 48 divisors (see below), whose sum is σ = 2324308608. Its totient is φ = 284492208.

The previous prime is 997383533. The next prime is 997383547. The reversal of 997383534 is 435383799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997383533) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 198319 + ... + 203285.

It is an arithmetic number, because the mean of its divisors is an integer number (48423096).

Almost surely, 2^997383534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 997383534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1162154304).

997383534 is an abundant number, since it is smaller than the sum of its proper divisors (1326925074).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

997383534 is a wasteful number, since it uses less digits than its factorization.

997383534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5669 (or 5662 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 51.

The square root of 997383534 is about 31581.3795455487. The cubic root of 997383534 is about 999.1270829041.

The spelling of 997383534 in words is "nine hundred ninety-seven million, three hundred eighty-three thousand, five hundred thirty-four".