997000722 has 24 divisors (see below), whose sum is σ = 2160759900. Its totient is φ = 332242560.

The previous prime is 997000691. The next prime is 997000723. The reversal of 997000722 is 227000799.

It can be written as a sum of positive squares in 2 ways, for example, as 995465601 + 1535121 = 31551^2 + 1239^2 .

It is not an unprimeable number, because it can be changed into a prime (997000723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 105654 + ... + 114702.

Almost surely, 2^997000722 is an apocalyptic number.

997000722 is an abundant number, since it is smaller than the sum of its proper divisors (1163759178).

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

997000722 is a wasteful number, since it uses less digits than its factorization.

997000722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15178 (or 15175 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 36.

The square root of 997000722 is about 31575.3182406765. The cubic root of 997000722 is about 998.9992394791. Note that the first 3 decimals are identical.

The spelling of 997000722 in words is "nine hundred ninety-seven million, seven hundred twenty-two", and thus it is an aban number.